Time, space, and spectrally resolved studies on J-aggregate interactions in zeolite L nanochannels.
Temporally and spectrally resolved confocal microscopy has been used to explore the behavior of pyronine intercalated zeolite L crystals at different loadings. The low pyronine loading of 0.6% exhibits photophysical behavior similar to that of the free molecule in solution, indicating molecules are isolated from each other in the crystal channels. The higher loading of 20% results in a dye gradient along the channel axis, and the presence of an additional red-shifted spectroscopic transition, with shorter lifetimes. The new band is assigned to an inline arrangement of the molecules undergoing a J-aggregate-type coupling, a process so far not observed in subnanometer channels.
Busby
Michael
M
Physikalisches Institut and Center for Nanotechnology, CeNTech, University of Münster, Mendelstrasse 7, 48149 Münster, Germany. busby.michael1@gmail.com
Blum
Christian
C
Tibben
Marc
M
Fibikar
Sandra
S
Calzaferri
Gion
G
Subramaniam
Vinod
V
De Cola
Luisa
L
D002412:Cations / Q000737:chemistry; D004396:Coloring Agents / Q000737:chemistry; D018613:Microscopy, Confocal; D008855:Microscopy, Electron, Scanning; D008856:Microscopy, Fluorescence; D008958:Models, Molecular; D015394:Molecular Structure; D053758:Nanoparticles / Q000737:chemistry* / Q000648:ultrastructure*; D010316:Particle Size; D011754:Pyronine / Q000737:chemistry; D013997:Time Factors; D017641:Zeolites / Q000138:chemical synthesis / Q000737:chemistry*
D002412:Cations; D004396:Coloring Agents; D017641:Zeolites; D011754:Pyronine