Journal
ACS PHOTONICS
Volume 5, Issue 1, Pages 151-157Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acsphotonics.7b00553
Keywords
PIC dye; MgAPO; crystallization inclusion method; strategic distribution within nanochannels; energy transfer; unidirectional antenna effect
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Funding
- Gobierno Vasco [IT912-16]
- Ministerio de Economia y Competitividad MINECO [MAT2014-51937-C3-3-P, MAT2016-77496-R, MAT-2015-65767-P]
- Universidad del Pais Vasco (UPV-EHU)
- MINECO [RYC-2011-09505]
- European Research Council [280064]
- FWO [G056314N, G0B5514N, G081916N]
- JSPS KAKENHI [JP17H03003, JP17H05244, JP17H05458]
- Grants-in-Aid for Scientific Research [17H05458, 17H05244, 17H03003] Funding Source: KAKEN
- European Research Council (ERC) [280064] Funding Source: European Research Council (ERC)
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A cyanine dye (PIC) was occluded into two 1D-nanopoporus Mg-containing aluminophosphates with different pore size (MgAPO-5 and MgAPO-36. with AFI and ATS zeolitic structure types, with cylindrical channels of 7.3 angstrom diameter and elliptical channels of 6.7 angstrom X 7.5 angstrom, respectively) by crystallization inclusion method. Different J-aggregates are photophysically characterized as a consequence of the different pore size of the MgAPO frameworks, with emission bands at 565 nm and at 610 nm in MgAPO-5 and MgAPO-36, respectively. Computational results indicate a more linear geometry of the J-aggregates inside the nanochannels of the MgAPO-36 sample than those in MgAPO-5, which is as a consequence of the more constrained environment in the former. For the same reason, the fluorescence of the PIC monomers at 550 nm is also activated within the MgAPO-36 channels. Owing to the strategic distribution of the fluorescent PIC species in MgAPO-36 crystals (monomers at one edge and J-aggregates with intriguing emission properties at the other edge) an efficient and one-directional antenna system is obtained. The unidirectional energy transfer process from monomers to J-aggregates is demonstrated by remote excitation experiments along tens of microns of distance.
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