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Article
Chemistry, Physical
Adithya Kamalakshan et al.
Summary: Photoluminescent one-dimensional hybrid nano-structured materials incorporating trivalent lanthanide ion, terbium (Tb3+), and organic photosensitizers DHN or Phen are developed. These luminescent lanthanide containing hybrid nanotubular assemblies can serve as templates for spontaneous integration of strongly coupled PIC dye J-aggregates, with potential applications in sensing and optoelectronics.
JOURNAL OF PHYSICAL CHEMISTRY C
(2023)
Article
Chemistry, Multidisciplinary
Ranita Samanta et al.
Summary: Although there are many mechanically flexible crystals, their utility in all-flexible devices is not yet demonstrated. In this study, we report two alkylated diketopyrrolopyrrole (DPP) semiconducting single crystals, one of which is elastic and the other is brittle. The elastic crystal showed superior stress tolerance and field-effect mobility compared to the brittle crystal. The results provide insights into the bending mechanism and demonstrate the untapped potential of mechanically flexible semiconducting crystals for designing durable field-effect transistor devices.
Article
Chemistry, Multidisciplinary
Baolei Tang et al.
Summary: Abundant high-performance organic crystals have been reported, but their brittleness restricts their applications. Some organic crystals have been designed to be deformable, but their development relies on molecular framework design. In this study, a side-chain engineering strategy is proposed to easily modulate the mechanical compliance of organic crystals. Changing the side chains subtly alters the mechanical behaviors while maintaining the unique optical functions. The potential applications of the flexible crystals as soft optical transducing media are evaluated through optical waveguides and amplified spontaneous emissions.
Article
Chemistry, Multidisciplinary
Avulu Vinod Kumar et al.
Summary: In this study, we introduce visible light guiding optical fibers with underwater operational capability for subaquatic communication and sensing technologies. The fibers are composed of mechanically flexible, blue-violet fluorescent BPP crystal waveguides with high-aspect ratio, demonstrating their amphibian-like character in both ambient and underwater conditions. The high flexibility of the crystals allows for mechanical alteration of the fiber's output light direction, making them suitable for high-precision lighting and sensing applications. This development of multi-environment-compatible and mechanically flexible organic optical fibers as sensing materials has tremendous potential for short-range underwater photonic technologies.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2023)
Article
Chemistry, Physical
Sajesh P. Thomas et al.
Summary: This article reports a mechanically flexible one-dimensional coordination polymer that exhibits elastic bending. By utilizing various techniques including XRD, high-pressure crystallography, synchrotron micro-XRD mapping, and high-resolution synchrotron X-ray charge density analysis, the inter and intra-chain bonding as well as structural flexibility were quantitatively investigated. The results reveal that the helical coordination polymer behaves like a spring when subjected to external stimuli. The exceptional coordination sphere flexibility, attributed to the presence of Jahn-Teller distorted coordination bonds, contributes to the polymer's flexibility.
CHEMISTRY OF MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Ozana Misura et al.
Summary: We presented an approach for enhancing the elasticity of crystals with suboptimal elastic performances through rational design. A critical hydrogen-bonding link in the structure of the parent material was identified and modified via cocrystallization. The extent of strengthening the critical link showed an excellent correlation with the improvement in elastic flexibility materials.
CRYSTAL GROWTH & DESIGN
(2023)
Article
Chemistry, Multidisciplinary
Yoshihiro Sekine et al.
Summary: Elastic crystals are novel materials for optoelectronics and solar cells. This study reports the preparation of mechanically flexible compounds using metal coordination complexes. The packing structure of the crystals was influenced by the crystallization solvent, and control over the packing process was crucial in obtaining designed flexibilities and structures. New Pd and Pt complexes with high elastic strains were demonstrated, and the effects were attributed to microscopic changes in bond distance between metals and ligands. These findings are expected to inspire the development of metal-complex-based flexible crystals.
CRYSTAL GROWTH & DESIGN
(2023)
Letter
Chemistry, Physical
Chao-Fei Xu et al.
Summary: Organic charge transfer cocrystals provide a convenient method for synthesizing low-dimensional near-infrared emitters. By regulating the biaxial intermolecular CT interaction, single-crystalline microsheets with remarkable NIR emission were synthesized. These organic microsheets, with tunable thicknesses, exhibit thickness-dependent NIR optical transportation performance, potentially paving the way for 2D photonics at telecom wavelengths.
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
(2023)
Article
Chemistry, Multidisciplinary
Yu-Shan Chen et al.
Summary: We report a new class of mechanically adaptive organic crystals that can undergo photoinduced elongation up to 21.6% or 0.40 mm without fragmentation. This demonstrates a strong cohesion of the crystal structure and provides a new insight into photomechanical deformations.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2023)
Article
Chemistry, Multidisciplinary
Jiawei Lin et al.
Summary: In this study, we report the remarkable 2D elastic bending behaviors in a nonaromatic organic molecular crystal, which is usually obtained based on weak interactions in aromatic systems. Furthermore, the crucial role of strong hydrogen bonding interactions in the reversible bending is verified.
CHEMICAL COMMUNICATIONS
(2023)
Article
Chemistry, Physical
Xiaochun Wang et al.
Summary: Fiber-optic sensors are gaining attention for their high sensitivity and fast response. However, rigid optical fibers are prone to damage and fractures in applications involving large strains, making it difficult to locate and repair the fractures. Optically self-healing fiberoptic sensors are highly desirable for such applications.
CHEMISTRY OF MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Deepak Manoharan et al.
Summary: This study presents the manipulation of mechanical plasticity in a series of 2-benzylidene-1-indanone derivative crystals through the control of intermolecular interactions for the first time. The influence of intermolecular interactions on plastic properties is rationalized through nanoindentation and energy framework calculations.
CRYSTAL GROWTH & DESIGN
(2023)
Article
Chemistry, Multidisciplinary
Yang Ye et al.
Summary: In this study, a guest molecule was introduced via hydrogen-bonded solvation, achieving better mechanical elasticity and higher fluorescence emission compared to the host heterocyclic Schiff base molecule crystal. The role of solvent molecules in changing the structure and interaction energy framework was investigated, and a good waveguide property was observed in the flexible fluorescent solvate. Furthermore, the size effect on the optical loss coefficient of the waveguide was discussed.
CRYSTAL GROWTH & DESIGN
(2023)
Article
Chemistry, Physical
Chao-Fei Xu et al.
Summary: By regulating biaxial intermolecular charge transfer interaction, single-crystalline microsheets with significant near-infrared emission and a two-dimensional optical waveguide were successfully synthesized. These findings could pave the way for a new class of low-dimensional near-infrared emitters for 2D photonics at telecom wavelengths.
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
(2023)
Article
Chemistry, Physical
Mateja Pisacic et al.
Summary: This article presents the crystal structure and mechanical properties of a family of one-dimensional coordination polymers, which exhibit two-dimensional anisotropic flexibility. The study reveals that the relative strength and direction of hydrogen bonding interactions play a crucial role in determining the mechanical response.
CHEMISTRY OF MATERIALS
(2022)
Article
Chemistry, Multidisciplinary
Yu Liu et al.
Summary: Mechanical flexible organic crystals with optical properties have attracted research interest. A plastic organic crystal, flufenamic acid (FFA) form III crystal, was found to exhibit highly plastic bending and hand-twistable behavior, as well as unique bending mechanofluorochromism behavior. This has implications for the design of future tunable fluorescent materials.
CRYSTAL GROWTH & DESIGN
(2022)
Article
Chemistry, Multidisciplinary
Parvej Alam et al.
Summary: Long-persistent luminescence (LPL), also known as afterglow, is a phenomenon where a material continues to emit light after the excitation source is turned off. It has attracted much interest due to its fundamental nature and potential in developing new functional materials. Most current LPL materials are complex inorganic systems that require harsh synthetic procedures and rare-earth metals. However, metal-free organic long-persistent luminescence (OLPL) has gained interest as it overcomes some of the disadvantages of inorganic systems. The most successful method to generate OLPL systems is through binary donor-acceptor exciplex systems, but the ratios of the binary systems can complicate reproducibility and large-scale production. Therefore, simpler OLPL systems are needed for easier design and production.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2022)
Article
Chemistry, Multidisciplinary
Xiunan Zhang et al.
Summary: A novel flexible red fluorophore, dimethyl 1,2,3,4,6,7,8,9-octahydropyrido[2,3-g]quinoline-5,10-dicarboxylate, with a large Stokes shift up to 231 nm, was designed and synthesized. It exhibits red emission in solution and enhanced red emission in the crystallized state. The butterfly-like tricyclic architecture shows elastic property, acid/base vapor stimulus response, and selective fluorescence detection of Cu2+. This work provides a feasible and efficient strategy for multifunctional fluorophores compared to typical extended pi-conjugated systems.
CRYSTAL GROWTH & DESIGN
(2022)
Article
Chemistry, Multidisciplinary
Zheng Tang et al.
Summary: In this study, a series of mechanically compliant single crystals composed of metal-organic complexes were synthesized, and the transition from elastic bending to plastic bending was achieved by controlling the ligand structure. The mechanical responses of these crystals were comprehensively investigated both experimentally and theoretically.
SCIENCE CHINA-CHEMISTRY
(2022)
Article
Chemistry, Applied
Jieting He et al.
Summary: In this study, two compounds with simple structures were reported to exhibit different bending properties under stress. The TPABA crystal showed multi-faceted bending properties and demonstrated flexible optical waveguide characteristics, while the DMBA crystal underwent single-faceted plastic deformation and fracture.
Article
Chemistry, Multidisciplinary
Jiang Peng et al.
Summary: This article reports on a simple and efficient strategy for fabricating hybrid organic crystalline materials with low-temperature, humidity actuation, and waveguide properties. The resulting hybrids exhibit excellent elastic properties, actuation behavior, and optical waveguide performance.
CRYSTAL GROWTH & DESIGN
(2022)
Article
Materials Science, Multidisciplinary
Parvati Marandi et al.
Summary: Despite the advances in understanding flexibility in organic single crystals and their defect-free packing, they are rarely used in electronic devices. This study reports on the modulation of mechanical flexibility and fluorescence of pyrene-functionalized naphthalidenimine single crystals in response to chemical stimuli. Crystallographic investigations reveal that subtle changes in weak intermolecular interactions play a crucial role in defining the mechanical flexibility of these crystals. Furthermore, the multi-stimuli responsive properties of these single crystals are used to build a multiple-input, multiple-output molecular logic gate.
ACS MATERIALS LETTERS
(2022)
Article
Chemistry, Multidisciplinary
Subhrajyoti Bhandary et al.
Summary: We have discovered the elastic deformability of flexible organic luminescent crystals under mechanical stress and revealed the phenomenon of blue shift in phosphorescence emission. The relationship between structure-elastic functionality and phosphorescence modulation has been quantitatively studied by analyzing the weak interactions involving chalcogen elements.
Article
Chemistry, Multidisciplinary
Amila M. Abeysekera et al.
Summary: A structure-property analysis of ten compositionally and chemically similar co-crystals reveals that different mechanical behaviors, such as brittle, plastic, and elastic deformation, can be categorized into structurally similar groups based on specific intermolecular interactions and packing features in each crystal structure.
CHEMICAL COMMUNICATIONS
(2022)
Article
Chemistry, Multidisciplinary
Indira S. Divya et al.
Summary: This study reports on the co-existence of elastic and plastic properties in flexible organic crystals. It demonstrates the importance of molecular arrangement and weak interactions in achieving this exceptional mechanical trait, providing valuable insights for the possible co-existence of orthogonal mechanical characteristics in molecular crystals.
Article
Chemistry, Applied
Jiang Peng et al.
Summary: The study investigates the reversible E-Z isomerization reactions and photomechanical behaviors of photo-reactive acylhydrazone derivatives in crystals. Different shaped crystals exhibit varying properties under light exposure, suggesting potential applications in crystal actuators and position-controllable optical transducers.
Article
Chemistry, Multidisciplinary
Minsu Park et al.
Summary: Functionalized graphene quantum dots (F-GQDs) with POSS, PEG, and HDA show significant enhancement in photoluminescence intensity in solid-state due to reduced pi-pi stacking interactions, enabling quenching-resistant PL. GQD-based white light-emitting diodes using HDA-GQDs achieve efficient down-conversion for high-quality white light emission.
ADVANCED FUNCTIONAL MATERIALS
(2021)
Article
Multidisciplinary Sciences
Peizhen Xu et al.
Summary: Ice grown as single-crystal ice microfibers (IMFs) exhibits high elasticity and can be reversibly bent at low temperatures. A pressure-induced phase transition of ice from Ih to II was observed on the compressive side of sharply bent IMFs. The high optical quality of these flexible ice fibers opens up opportunities for low-loss optical waveguiding and whispering-gallery-mode resonance.
Article
Chemistry, Multidisciplinary
Qi Di et al.
Summary: This study presented an organic crystal that exhibits elastic bending and plastic twisting in response to loading stress and shearing force, respectively, overcoming the limitations of traditional mechanochromic organic crystals in responding to tensile forces. The crystal showed potential application as a tension sensor with a low detection limit and high sensitivity. The mechanism of emission wavelength shifts during stretching was revealed through theoretical calculations and X-ray crystal structure analyses.
Review
Chemistry, Multidisciplinary
Suqian Ma et al.
Summary: The review discusses the unique optoelectronic properties of organic molecular aggregates in the aggregate state, with a focus on the effects of aggregation structure and molecular packing mode. It presents recent progress on basic and novel aggregate forms, as well as coassembled forms with distinctive optical features. Guidelines for future preprogramming molecular design to fine-tune emission feature through specific aggregation model for developing organic molecular aggregates with desirable optoelectronic properties are anticipated.
Article
Chemistry, Multidisciplinary
Shotaro Hayashi
Summary: The study investigated the mechanically curving-induced photoluminescence and photoluminescence anisotropy changes in an elastic organic crystal, revealing that the crystal deformation affects the intermolecular pi-pi stacking and transition dipole orientations.
Article
Chemistry, Multidisciplinary
Patrick Commins et al.
Summary: This study reports and characterizes the first plastically bendable single crystal of a permanent organic radical, which exhibits exceedingly soft characteristics due to weak interactions between radicals and S-N interactions. EPR imaging of the bent single crystal reveals the impact of deformation on the crystal's three-dimensional spin density. The unusual mechanical compliance of this material opens prospects for the development of flexible light-weight organic magnetoresistance devices based on weak, non-hydrogen-bonded interactions in molecular crystals.
Article
Chemistry, Multidisciplinary
Huapeng Liu et al.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2020)
Article
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Bin Liu et al.
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
(2020)
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Chenguang Wang et al.
Review
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Patrick Commins et al.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2019)
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Ramesh Devarapalli et al.
CHEMISTRY OF MATERIALS
(2019)
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Kunlin Wang et al.
CHEMISTRY OF MATERIALS
(2019)
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Shenye Hu et al.
CHEMISTRY OF MATERIALS
(2019)
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Anna Worthy et al.
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ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2018)
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Lukman O. Alimi et al.
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(2018)
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Luca Catalano et al.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
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(2017)
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(2017)
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Soumyajit Ghosh et al.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2012)
