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One-Directional Antenna Systems: Energy Transfer from Monomers to J-Aggregates within 1D Nanoporous Aluminophosphates

AuthorsSola-Llano, Rebeca; Fujita, Yasuhiko; Gómez-Hortigüela Sainz, Luis ; Alfayate Lanza, Almudena ; Ujii, Hiroshi; Fron, Eduard; Toyouchi, Shuichi; Pérez Pariente, Joaquín ; López-Arbeloa, Íñigo; Martínez, Virginia
KeywordsPIC dye
Crystallization inclusion method
Strategic distribution within nanochannels
Energy transfer
Unidirectional antenna effect
Issue Date2018
PublisherAmerican Chemical Society
CitationACS Photonics 5(1): 151-157 (2018)
AbstractA 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 Å diameter and elliptical channels of 6.7 Å × 7.5 Å, 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.
DescriptionPublication Date (Web): October 19, 2017.
Publisher version (URL)http://dx.doi.org/10.1021/acsphotonics.7b00553
Appears in Collections:(ICP) Artículos
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