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Article
Chemistry, Multidisciplinary
W. Sun et al.
Summary: By doping organic materials into a polyvinyl alcohol matrix, visible-light excitation organic RTP materials with blue-green phosphorescence emission were achieved. The afterglow colors of these materials can be adjusted by co-doping fluorescence dyes. However, the RTP phenomenon disappears when the hydrogen bonding is broken by water molecules. This drawback was overcome by constructing an Aphen-epoxy resin composite system.
MATERIALS TODAY CHEMISTRY
(2023)
Article
Nanoscience & Nanotechnology
Runcong Feng et al.
Summary: The development of new polymer-based room-temperature phosphorescence materials is important for information anti-counterfeiting. Coumarin derivatives (CMDs) were doped into PVA, PAM, corn starch, and PAN, showing long-lived phosphorescence emissions. CMDs-doped PAM films can display long-lived emissions in a wide temperature range, expanding the options for polymer-based phosphorescent materials.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Chemistry, Multidisciplinary
Iida Partanen et al.
Summary: Crystalline diphosphonium iodides with different aromatic spacers exhibit photoemissive properties under ambient conditions. The emission colors and intensities are determined by the structure and substitution geometry of the chromophore motif, as well as the anion-p interactions. Time-resolved and variable-temperature luminescence studies confirm the phosphorescent nature of these compounds, with observed lifetimes ranging from 0.46 to 92.23 μs at 297 K. The fast radiative rate constants for salts 1-3 suggest the involvement of spin-orbit coupling and charge transfer in the triplet excited state. This metal-free phosphorescence mechanism is comparable to that of transition metal complexes and organic luminophores utilizing thermally activated delayed fluorescence.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2023)
Article
Chemistry, Multidisciplinary
Ke Zhang et al.
Summary: In this study, we present an aromatic amide skeleton that can manipulate triplet excited states to achieve bright and long-lived blue phosphorescence. The aromatic amides promote strong spin-orbit coupling and enable multiple channels for emitting states. By forming robust hydrogen bonding with polyvinyl alcohol, non-radiative relaxations are suppressed, resulting in high quantum yields of phosphorescence in confined films. The blue afterglow of the films can be used in various applications such as information display and anti-counterfeiting. The smart aromatic amide skeleton provides a potential molecular design prototype for controlling triplet excited states and achieving ultralong phosphorescence with different colors.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2023)
Article
Materials Science, Textiles
Liuqi Kong et al.
Article
Chemistry, Organic
Biswa Ranjan Swain et al.
Summary: Fluoride ion is an important trace element in the human body with potential hazards if deficient or excessive. Developing sensors for selective and sensitive detection of fluoride ion is necessary due to its competition with other biologically active anions. Coumarins have unique properties that make them ideal for developing fluoride ion sensors, and this paper summarizes the development of coumarin-based sensors over the past two decades. These sensors utilize hydrogen bonding/deprotonation/cleavage mechanisms to selectively and sensitively detect fluoride ions.
Article
Chemistry, Multidisciplinary
Shuo Ma et al.
Summary: In this study, intense circularly polarized luminescence emission was generated by introducing an optically inactive helical polymer to chiral small molecular fluorophores. Multicolor circularly polarized luminescence emissions were achieved in composite films, with the highest luminescence dissymmetry factor of up to -0.028. Using these CPL-active films as donors, red circularly polarized luminescence was further realized through a circularly polarized fluorescence-energy transfer strategy, with a luminescence dissymmetry factor of up to -0.011.
ACS CENTRAL SCIENCE
(2023)
Article
Chemistry, Multidisciplinary
Hao Su et al.
Summary: Organic room-temperature phosphorescent (RTP) materials often contain polymeric components, which not only protect the phosphors from thermal and collisional quenching, but also play active roles in color modulation, air sensitivity alteration, and enhanced bacterial elimination. These findings demonstrate that the wide range of polymeric structures and functionalities can be applied to broaden the application horizons of RTP materials.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2023)
Review
Chemistry, Inorganic & Nuclear
Juqing Gu et al.
Summary: For organic opto-electronic materials, the macroscopic performance of molecular aggregates is not simply the combination of single molecules. The review focuses on the regulation of molecular aggregation to improve and generate luminescent properties. Mechanoluminescence (ML) and room-temperature phosphorescence (RTP) are emphasized as emission properties sensitive to molecular aggregates. The study also highlights the dynamic photophysical properties related to molecular motions and/or packing modes, as well as the adjustable molecular packing in different functional materials.
COORDINATION CHEMISTRY REVIEWS
(2023)
Article
Chemistry, Applied
Shuhui Ding et al.
Summary: Unlike heavy atom effect and n-pi* transition, charge transfer technology and dipole effect can enhance kISC and achieve long-lived room-temperature phosphorescence in dopant-matrix systems. The BF2bdk dopants exhibit charge transfer characters and have multiple phenyl groups in the excited state, enabling efficient intersystem crossing. The selected crystalline matrices suppress nonradiative decay and oxygen quenching, resulting in bright and long-lived room-temperature phosphorescence materials.
Article
Chemistry, Applied
Emma Alexander et al.
Summary: We observe efficient room temperature phosphorescence from coumarin 106 embedded in a poly (vinyl alcohol) film. This phosphorescence occurs at 465 nm, which is outside the absorption band, when directly excited to the triplet state. The phosphorescence properties, such as spectra, lifetimes, and temperature dependence, are similar for UV and blue excitations but the emission anisotropy differs significantly.
Article
Chemistry, Physical
Sumi K. Suresh et al.
Summary: A series of 9-butyl-9H-carbazole derivatives with intense solid-state emission were synthesized by the Knoevenagel reaction. These derivatives exhibited remarkable aggregation-induced emission (AIE), solvatofluorochromism, and mechanofluorochromic (MFC) properties depending on the -CF3 substitution site. The study explored the effect of -CF3 substitution position in tuning and modifying the luminescence properties of the organic solids.
JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY
(2023)
Article
Chemistry, Multidisciplinary
Changfeng Si et al.
Summary: Corannulene-derived materials have been extensively studied in energy storage and solar cells. However, their potential as emitters in light-emitting sensors and OLEDs has been largely unexplored. In this study, a family of multi-D-A motifs, TCzPhCor, TDMACPhCor, and TPXZPhCor, were developed by using corannulene as the acceptor and different donors. These materials exhibit multiple phosphorescence and show promise in temperature sensing and OLED applications.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2023)
Review
Chemistry, Multidisciplinary
Jingjing Guo et al.
Summary: Long-lived organic room-temperature phosphorescence materials have great potential applications in various fields. Compared to traditional fluorescence, phosphorescence originates from slow radiative transitions of triplet excitons. Enhancing intersystem crossing rate and suppressing nonradiative relaxation channels can achieve efficient phosphorescence in purely organic materials. Amorphous organic polymers offer improved processability and flexibility, making them more competitive for achieving long-lived phosphorescence emission.
ACCOUNTS OF CHEMICAL RESEARCH
(2022)
Article
Engineering, Environmental
Maoyang Jian et al.
Summary: This study presents the synthesis, single crystal structures, afterglow studies, and data protection applications of the ICZ families with five isomers for the first time. By doping ICZ into PVA, a rigid and confined environment was built, hindering molecular motion and enhancing phosphorescence at room temperature. These ICZs showed impressive photoluminescence efficiency and afterglow performance comparable to reported organic amorphous afterglows, suggesting potential for developing new organic amorphous afterglow materials and applications.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Chemistry, Physical
Aritra Das et al.
Summary: Due to its wide range of applications, the formation of triplet states and phosphorescence has been a research frontier for over eight decades. Incorporation of heavy atoms is commonly used to facilitate intersystem crossing (ISC) and triplet formation. The excited state dynamics that governs ISC and heavy atom effect (HAE) need to be studied in detail. The contrasting effects of iodine and bromine substitutions at the 3 position of coumarin-1 suggest the presence of other features to fully understand HAE.
JOURNAL OF PHYSICAL CHEMISTRY A
(2022)
Article
Chemistry, Physical
Dahua Li et al.
Summary: This study utilizes synthetic polymers to control the excited state properties of organic afterglow materials, resulting in high-performance materials fabricated at room temperature. The interaction between polymers and excited states reduces the excited energy levels and enhances intersystem crossing. Additionally, the polymers suppress intramolecular motion and protect triplets from oxygen quenching.
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
(2022)
Article
Chemistry, Multidisciplinary
Ye Tao et al.
Summary: This study proposes an effective strategy to design stimuli-responsive OURTP materials by engineering the resonance linkage between flexible chain and phosphor units. The designed materials demonstrate efficient photoactivated OURTP and tunable responsivity rate constants.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2022)
Article
Materials Science, Multidisciplinary
Zhonghao Wang et al.
Summary: In this study, a series of irradiation-dependent long-lived room temperature phosphorescent (LRTP) materials were fabricated by a consuming triplet oxygen strategy, and their performance was found to be dependent on chromophore structure and polymeric molecular weight. The phosphorescence lifetime can be significantly increased by extending the UV irradiation time.
ADVANCED OPTICAL MATERIALS
(2022)
Article
Chemistry, Multidisciplinary
Swadhin Garain et al.
Summary: This study explores the potential of anion-π interactions in modulating excited states and proposes a molecular design that achieves phosphorescence emission and local excited triplet state emission simultaneously in solution phase using an anion-π-mediated supramolecular scaffold. Steady-state and time-resolved spectroscopy, along with theoretical calculations, provide detailed insights into the excited-state characteristics of the phosphor.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2022)
Article
Chemistry, Multidisciplinary
Xian Zheng et al.
Summary: This study designed and prepared three molecular weight polymers and investigated the changes in their fluorescence emissions. By doping these polymers into a PAN matrix, molecular weight-dependent polymeric RTP materials were successfully achieved, and a redshift phenomenon was discovered, which may be attributed to different aggregation states formed by assembly of different molecular weight polymeric chains. These polymeric phosphors can be used as anti-counterfeiting ink for advanced information encryption.
ADVANCED MATERIALS INTERFACES
(2022)
Article
Chemistry, Multidisciplinary
Malik L. Williams et al.
Summary: The study reveals subnanosecond triplet formation in one-dimensional cofacial pi stacks of D-A cocrystals, showing a correlation between SOCT-ISC rates and charge delocalization in CT exciton states. Time-resolved EPR spectroscopy further investigates the recombination of Cor and Pyr with C5PDI and NDA to form triplet excitons.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2022)
Article
Multidisciplinary Sciences
Xiaokang Yao et al.
Summary: The introduction of carboxyl groups into organic phosphors enables the formation of intense repulsive interactions between isolated molecules and the matrix, leading to bright organic phosphorescence in films. This finding expands the potential applications of ultralong organic phosphorescence materials.
NATURE COMMUNICATIONS
(2022)
Article
Chemistry, Multidisciplinary
Swadhin Garain et al.
Summary: Engineering the excited state landscapes of organic molecules using non-covalent interactions with appropriate donors allows for the modulation of emission characteristics and the achievement of ambient triplet harvesting. This study demonstrates the selective harvesting of emission from locally excited and charge-transfer singlet and triplet states through the interaction between a pyromellitic diimide derivative and donor molecules. The findings provide new dimensions to the existing molecular designs employed for triplet harvesting.
Article
Materials Science, Multidisciplinary
Haozhong Wu et al.
Summary: This research achieves polarity enhanced emission by studying the intramolecular charge transfer mechanism. The weak emission in non-polar solvents is attributed to hole-electron overlap, while emission enhancement in highly polar solvents is achieved by reducing overlap and increasing hole-electron coupling. Excessive charge separation causes fluorescence quenching in highly polar solvents. These findings provide guidelines for designing new molecular systems with polarity enhanced emission behavior.
JOURNAL OF MATERIALS CHEMISTRY C
(2022)
Article
Chemistry, Physical
Ravinder Singh et al.
Summary: A judicious strategy was used to investigate the regio-positional effects of substituents on the photophysical properties of 6-X-CUMs, revealing striking changes in properties for 6-NEt2-CUM compared to conventional 7-NEt2-CUM. The tailored 6-X-CUMs show promise as a new class of multistimuli-responsive materials with unique emission solvatochromism and acidification-induced properties.
JOURNAL OF PHYSICAL CHEMISTRY B
(2021)
Article
Chemistry, Physical
Weidong Qiu et al.
Summary: Introducing an intermediate charge transfer (CT) state can accelerate the triplet exciton population and improve phosphorescent emission efficiency. By adjusting the host-guest energy gap offset, a balance between long phosphorescence lifetime and high phosphorescent quantum yield can be achieved.
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
(2021)
Article
Materials Science, Multidisciplinary
Yan Sun et al.
Summary: A highly bright afterglow system is reported, achieved through doping spiro-shaped difluoroboron beta-diketonate luminogens into benzophenone matrices. The material exhibits intense green afterglow, brighter than typical inorganic afterglow materials, and can last for more than 5 seconds under room light.
ADVANCED OPTICAL MATERIALS
(2021)
Article
Chemistry, Multidisciplinary
Hongzhuo Wu et al.
Summary: This study presents a rational strategy to activate wide-color ranged and persistent room-temperature phosphorescence (RTP) from amorphous films by embedding electron-rich organic phosphors into an electron-deficient matrix polyacrylonitrile (PAN). The ultralong lifetime of 968.1 ms was obtained for the doped film TBB-6OMe@PAN through tailoring noncovalent interactions between the electron-deficient PAN matrix and electron-rich organic phosphors, indicating the activation of persistent RTP may be triggered by strong electrostatic interactions between the two components. Further theoretical calculations demonstrated that both electrostatic and dispersion interactions are responsible for the activation of persistent RTP in the doped films, with the doped film also showing excellent water resistance after 12 weeks.
ADVANCED FUNCTIONAL MATERIALS
(2021)
Article
Chemistry, Multidisciplinary
Zi-Ang Yan et al.
Summary: This study introduces a new general strategy for designing and developing pure organic RTP materials starting from an existing library of organic dyes without the need for complicated chemical synthesis.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2021)
Article
Chemistry, Multidisciplinary
Yongfeng Zhang et al.
Summary: The research has successfully developed polymer-based room-temperature phosphorescence materials using a hydrogen-bonding and coassembly strategy, resulting in large-area, flexible, transparent, and long-lived RTP systems. By doping different organic chromophores into PVA films, long-lived phosphorescence emission and high luminance have been achieved, showcasing the potential for large-area, flexible, and transparent emitting materials.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2021)
Article
Materials Science, Multidisciplinary
Qingyang Xu et al.
Summary: Six naphthalene-based thiochromanone analogs with different heterocycles were synthesized, showing bright phosphorescence when embedded into a polyvinyl alcohol matrix. The absorption spectra red-shifted as the size of the heterocycle decreased, with molecules containing a five-membered heterocycle extending to visible light, offering a new strategy for adjusting photophysical properties of phosphors.
JOURNAL OF MATERIALS CHEMISTRY C
(2021)
Article
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Dongyi Liu et al.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2020)
Article
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Yuqi Hou et al.
JOURNAL OF CHEMICAL PHYSICS
(2020)
Article
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Indranil Bhattacharjee et al.
ADVANCED MATERIALS
(2020)
Review
Nanoscience & Nanotechnology
Weijun Zhao et al.
NATURE REVIEWS MATERIALS
(2020)
Article
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Noreen Rehmat et al.
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(2020)
Review
Chemistry, Multidisciplinary
Hong-Bo Cheng et al.
CHEMICAL SOCIETY REVIEWS
(2020)
Review
Chemistry, Multidisciplinary
Duxia Cao et al.
Review
Chemistry, Multidisciplinary
Guojuan Qu et al.
CHINESE CHEMICAL LETTERS
(2019)
Article
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Yu Dong et al.
JOURNAL OF PHYSICAL CHEMISTRY C
(2019)
Article
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Hongwei Wu et al.
ADVANCED FUNCTIONAL MATERIALS
(2019)
Article
Chemistry, Multidisciplinary
Yu Xiong et al.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2018)
Article
Chemistry, Multidisciplinary
Linkun Huang et al.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2018)
Article
Chemistry, Multidisciplinary
Yingjie Zhao et al.
CHEMICAL COMMUNICATIONS
(2018)
Article
Materials Science, Multidisciplinary
Weijun Li et al.
JOURNAL OF MATERIALS CHEMISTRY C
(2017)
Article
Chemistry, Physical
Rajib Ghosh et al.
JOURNAL OF PHYSICAL CHEMISTRY A
(2015)
Review
Chemistry, Multidisciplinary
Martin Rosenberg et al.
Article
Chemistry, Multidisciplinary
Shuzo Hirata et al.
ADVANCED FUNCTIONAL MATERIALS
(2013)
Article
Chemistry, Physical
Michael T. Colvin et al.
JOURNAL OF PHYSICAL CHEMISTRY A
(2012)
Article
Spectroscopy
Lamine Cisse et al.
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
(2011)
Article
Spectroscopy
A Ramalingam et al.
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
(2000)
