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题名: Direct Observation of a Triplet-State Absorption-Emission Conversion in a Fullerene-Functionalized Pt(II) Metallacycle
作者: Zhang, Rui-Ling1, 2;  Yang, Yang1;  Yang, Song-Qiu1;  Neti, VenKata S. Pavan K.3;  Sepehrpour, Hajar3;  Stang, Peter J.3;  Han, Ke-Li1
刊名: JOURNAL OF PHYSICAL CHEMISTRY C
发表日期: 2017-07-13
DOI: 10.1021/acs.jpcc.7b05025
卷: 121, 期:27, 页:14975-14980
收录类别: SCI
文章类型: Article
WOS标题词: Science & Technology ;  Physical Sciences ;  Technology
类目[WOS]: Chemistry, Physical ;  Nanoscience & Nanotechnology ;  Materials Science, Multidisciplinary
研究领域[WOS]: Chemistry ;  Science & Technology - Other Topics ;  Materials Science
英文摘要: An interesting triplet excited-state absorption-emission conversion of a fullerene-functionalized Pt(II) metallacycle (C-60-Pt) caused by a concentration effect was directly observed by nanosecond transient absorption (ns TA) spectroscopy. In dilute solution, the triplet excited-state absorption (TESA) band was observed at about 750 nm with a lifetime of ca. 10.7 mu s. However, with increasing the concentration, the absorption band converted to a triplet excited-state emission (TESE) band with a longer lifetime of ca. 15.4 mu s. Femtosecond transient absorption experiments and quantum chemistry calculations were performed to reveal the excited-state decay pathways of C-60-Pt in concentrated solution. This conversion was ascribed to the formation of a triplet excimer, which forms at localized 3C*(60) states. This work demonstrates that radiative excimers with longer-lived triplet excited states can exist in concentrated solution, and this finding will provide useful information for applications of fullerene complexes, especially as photosensitizers.
关键词[WOS]: CYCLOMETALATED PLATINUM(II) COMPLEXES ;  ACTIVATED DELAYED FLUORESCENCE ;  PHOTOPHYSICAL PROPERTIES ;  PHOTODYNAMIC THERAPY ;  EXCIMER FORMATION ;  CHARGE SEPARATION ;  ELECTRON-TRANSFER ;  SINGLET FISSION ;  FLUID SOLUTIONS ;  DERIVATIVES
语种: 英语
WOS记录号: WOS:000405761600068
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/152051
Appears in Collections:中国科学院大连化学物理研究所_期刊论文

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作者单位: 1.Chinese Acad Sci, Dalian Inst Chem Phys, State Key Lab Mol React Dynam, Dalian 116023, Peoples R China
2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
3.Univ Utah, Dept Chem, Salt Lake City, UT 84112 USA

Recommended Citation:
Zhang, Rui-Ling,Yang, Yang,Yang, Song-Qiu,et al. Direct Observation of a Triplet-State Absorption-Emission Conversion in a Fullerene-Functionalized Pt(II) Metallacycle[J]. JOURNAL OF PHYSICAL CHEMISTRY C,2017,121(27):14975-14980.
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