TY - JOUR
T1 - Aggregation and excitation trapping of 3,3′-diethyl-9-methylthiacarbocyanine iodide in disordered and uniaxially oriented polymer films
AU - Synak, Anna
AU - Bojarski, Piotr
AU - Gryczyński, Ignacy
AU - Gryczyński, Zygmunt
AU - Rangełowa-Jankowska, Simeonika
AU - Kułak, Leszek
AU - Sadownik, Michał
AU - Kubicki, Aleksander
AU - Koprowska, Ewa
N1 - Funding Information:
This work has been supported by KBN 1-P03B-012-30 and Texas Research Fund for Emerging Technologies.
PY - 2008/8/20
Y1 - 2008/8/20
N2 - Photophysical properties of 3,3′-diethyl-9-methylthiacarbocyanine iodide (MDTCI) in disordered and uniaxially stretched poly(vinyl alcohol) films (PVA) are reported at high dye concentration. Ground-state formation of fluorescent MDTCI aggregates at high concentration was observed in unstretched and stretched PVA films using steady-state and time-resolved spectroscopic methods. It was found that fluorescence of MDTCI aggregates is almost totally depolarized in disordered matrix, but it remains partly polarized in the stretched PVA film despite energy transfer from monomers. The differences between spectral properties of aggregates in both matrices may result from partial orientation of aggregate transition moment and its immobilization in polymer cage.
AB - Photophysical properties of 3,3′-diethyl-9-methylthiacarbocyanine iodide (MDTCI) in disordered and uniaxially stretched poly(vinyl alcohol) films (PVA) are reported at high dye concentration. Ground-state formation of fluorescent MDTCI aggregates at high concentration was observed in unstretched and stretched PVA films using steady-state and time-resolved spectroscopic methods. It was found that fluorescence of MDTCI aggregates is almost totally depolarized in disordered matrix, but it remains partly polarized in the stretched PVA film despite energy transfer from monomers. The differences between spectral properties of aggregates in both matrices may result from partial orientation of aggregate transition moment and its immobilization in polymer cage.
UR - http://www.scopus.com/inward/record.url?scp=48749114969&partnerID=8YFLogxK
U2 - 10.1016/j.cplett.2008.07.036
DO - 10.1016/j.cplett.2008.07.036
M3 - Article
AN - SCOPUS:48749114969
SN - 0009-2614
VL - 461
SP - 222
EP - 225
JO - Chemical Physics Letters
JF - Chemical Physics Letters
IS - 4-6
ER -