{"title":"Photochemical Hole Burning and Debye-Waller Factor in Polyvinylalcohol doped with Ionic Porphyrins","authors":"K. Sakoda, Masayuki Maeda","doi":"10.1364/shbs.1994.wd38","DOIUrl":null,"url":null,"abstract":"Photochemical holes can be burned at relatively high temperatures in the Qx band of a free base porphyrin with ionic substituents when the molecule is dispersed in polyvinylalcohol (PVA) [1-2]. This characteristics of the porphyrin-PVA system is due to the facts that the Debye-Waller factor is relatively large [3] and the thermally activated backward reaction is small [4], Figure 1(a) shows one of such porphyrin molecules, TCPP(Na). The large Debye-Waller factor in porphyrin-PVA system is a direct consequence of a high mean phonon frequency. The typical phonon energy of the porphyrin-PVA system, which was determined as the energy deference between the zero-phonon hole and the bottom of the side hole, is as large as 25 cm–1. According to ref. 3, the Debye-Waller factor f(T) of porphyrin-PVA system is well represented by one-phonon approximation.","PeriodicalId":443330,"journal":{"name":"Spectral Hole-Burning and Related Spectroscopies: Science and Applications","volume":"1 1","pages":"0"},"PeriodicalIF":0.0000,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Spectral Hole-Burning and Related Spectroscopies: Science and Applications","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.1364/shbs.1994.wd38","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
引用次数: 0
Abstract
Photochemical holes can be burned at relatively high temperatures in the Qx band of a free base porphyrin with ionic substituents when the molecule is dispersed in polyvinylalcohol (PVA) [1-2]. This characteristics of the porphyrin-PVA system is due to the facts that the Debye-Waller factor is relatively large [3] and the thermally activated backward reaction is small [4], Figure 1(a) shows one of such porphyrin molecules, TCPP(Na). The large Debye-Waller factor in porphyrin-PVA system is a direct consequence of a high mean phonon frequency. The typical phonon energy of the porphyrin-PVA system, which was determined as the energy deference between the zero-phonon hole and the bottom of the side hole, is as large as 25 cm–1. According to ref. 3, the Debye-Waller factor f(T) of porphyrin-PVA system is well represented by one-phonon approximation.