Intrapolymer interactions between the excited singlet states in dilute solution
β Scribed by Hiroshi Masuhara; Naoto Tamai; Kazushige Inoue; Noboru Mataga
- Publisher
- Elsevier Science
- Year
- 1982
- Tongue
- English
- Weight
- 320 KB
- Volume
- 91
- Category
- Article
- ISSN
- 0009-2614
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β¦ Synopsis
lntrapolymcr processes~TS,+S,~S,,+S~-SI*S,and S,+SI -2T arc proposed, from the analyas of CYCNJIIO~ mtenslty dependenccs of the fluorescence dynamxs of polyurcthancs Jnd vmyl polymers ltsvmg cvbazolr chromophorcs The average raw constant of the chromophorc to chronlophorc energy rrsnsi'er IS cslnnatcd IO be lOl2 5-l
π SIMILAR VOLUMES
The dynamic behavior of the second excited singlet state of QCS has been investigated for the first time in liquid solutions. In perfluoroalkane solvents strong B-ji. fluorescence (@f up to 0.077) 1s observed when the molecule is excited to bound vibrational states. s lifetimes of up 10 2.8 ns are o
Time-resolved and steady state equations for successive singlet and triplet quenching by the same quencher in micelles are developed. The model assumes that: (i) the quencher can distribute between micellar and aqueous phases, (ii) the probe is completely micellized, and (iii) the distribution kinet
An upper limit to the relavation time of the first c.rcltcd electronic \mgIut st,ite (St) of a?ulcnc m cyclohcxanc ha\ been dctcrmincd for two cxcltatlon frequcncics. The lifctlmes of St cxcitcd by tingle picosecond duration optlcal pulses OI irequency 18910 crri' and 16OOC cm"' arc 5 1 ps and 5 2 p
The lluorescencc fiferimes and quantum yields of the S2 state of xantbionc in benzene and isoloctanc sotution at room temperature have been mcnsurcd. The Sz iifctimn wcrc found to bc I8 2 2 ps in bcnzcnc and 43 % 'I! ps in iso-ocrane. The non-radiative decay rate constant is 5.6 x lO'\* s-l in benz