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| Content Provider | World Health Organization (WHO)-Global Index Medicus |
|---|---|
| Author | Huang, Dandan Sun, Jifu Ma, Lihua Zhang, Caishun Zhao, Jianzhang |
| Description | Country affiliation: China Author Affiliation: Huang D ( State Key Laboratory of Fine Chemicals, School of Chemical Engineering, Dalian University of Technology, Dalian 116024, China.) |
| Abstract | A series of ketocoumarin compounds were prepared as heavy atom-free triplet photosensitizers. The photophysical properties of the compounds were studied with steady state and time-resolved spectroscopy. The compounds show absorption in the visible spectral region (molar absorption coefficients are up to ε = 136,000 M(-1) cm(-1) at 448 nm) and long-lived triplet excited states (τT = 199.7 µs) upon visible light photoexcitation. The compounds were used as triplet photosensitizers for singlet oxygen ((1)O2)-mediated photooxidation of 1,5-dihydroxylnaphthalene (DHN) to produce juglone. (1)O2 quantum yields of these compounds were determined in the range of 0.28-0.48. The ketocoumarins were also used as triplet photosensitizers for triplet-triplet annihilation (TTA) upconversion, and upconversion quantum yields up to 11.3% were observed. The results are useful for preparation of heavy atom-free triplet photosensitizers and for their application in photocatalysis and TTA upconversion. |
| File Format | HTM / HTML |
| ISSN | 1474905X |
| Issue Number | 5 |
| Journal | Photochemical & Photobiological Sciences |
| Volume Number | 12 |
| e-ISSN | 14749092 |
| Language | English |
| Publisher | Royal Society of Chemistry |
| Publisher Date | 2013-05-01 |
| Publisher Place | Great Britain (UK) |
| Access Restriction | One Nation One Subscription (ONOS) |
| Subject Keyword | Discipline Chemistry Discipline Biology |
| Content Type | Text |
| Resource Type | Article |
| Subject | Physical and Theoretical Chemistry |
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