期刊
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
卷 136, 期 49, 页码 17308-17316出版社
AMER CHEMICAL SOC
DOI: 10.1021/ja510183c
关键词
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资金
- Deutsche Forschungsgemeinschaft as part of the Excellence Cluster Engineering of Advanced Materials
- Collaborative Research Centre [SFB 953]
- Bayerische Staatsregierung as part of the Solar Technologies go Hybrid initiative
- Beilstein Foundation
- Universitat Bayern e.V.
We report the characterization of carbon nanodots (CNDs) synthesized under mild and controlled conditions, that is, in a microwave reactor. The CNDs thus synthesized exhibit homogeneous and narrowly dispersed optical properties. They are thus well suited as a testbed for studies of the photophysics of carbon-based nanoscopic emitters. In addition to steady-state investigations, time-correlated single-photon counting, fluorescence up-conversion, and transient pump probe absorption spectroscopy were used to elucidate the excited-state dynamics. Moreover, quenching the CND-based emission with electron donors or acceptors helped shed light on the nature of individual states. Density functional theory and semiempirical configuration-interaction calculations on model systems helped understand the fundamental structure-property relationships for this novel type of material.
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