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5 results on '"He, Zhangfei"'

1. Iodine-catalyzed R/S isomerization of allenic carotenoids

Author

He, Zhangfei, Gao, Guoqiang, Hand, Elli S., Kispert, Lowell D., Strand, Aase, and Liaaen-Jensen, Synnove

Subjects
Chemistry, Physical and theoretical -- Research, Iodine -- Physiological aspects, Isomerization -- Physiological aspects, Carotenoids -- Physiological aspects, Chemicals, plastics and rubber industries
Published
2002

2. Carotenoids in Liposomes: photodegration excited state lifetimes, and energy transfer

Author

He, Zhangfei, Kispert, Lowell D., Metzger, Robert M., Gosztola, David, and Wasielewski, Michael R.

Subjects
Energy transfer -- Analysis, Carotenoids -- Atomic properties, Liposomes -- Atomic properties, Chemicals, plastics and rubber industries
Abstract

Carotenoids and porphyrin analogues are covalently linked to mimic the natural photosynthetic systems for study of the energy and electron transfer between carotenoids and other molecules. The study indicates the photodegradation, the first excited singlet state lifetimes, and the energy transfer of carotenoids in liposomes.

Published
2000

3. Effects of polyene chain length and acceptor substituents on the stability of carotenoid radical cations

Author

Deng, Yi, Gao, Guoqiang, He, Zhangfei, and Kispert, Lowell D.

Subjects
Carotenoids -- Research, Cations -- Research, Polyenes -- Research, Chemicals, plastics and rubber industries
Abstract

Research into the stability of radical cations of three series of carotenoids substituted with terminal ester, cyano and aldehyde groups and with different numbers of backbone double bonds is presented. Radical cation stability is connected with the change in dipole moment between radical cations and the neutral species.

Published
2000

4. Effect of electrolytes and temperature on dictations and radical cations of carotenoids: electrochemical, optical absorption, and high-performance liquid chromatography

Author

He, Zhangfei and Kispert, Lowell D.

Subjects
Carotenoids -- Research, Chemical research -- Analysis, Chemistry, Physical and theoretical -- Research, Electrochemistry -- Research, Chemicals, plastics and rubber industries
Abstract

The effect of supporting electrolytes and temperature on Car.+ and Car2+ of two carotenoids is investigated with the use of optical absorption spectroscopy, electrochemistry and high-performance liquid chromatography.

Published
1999

5. Electrochemical and optical study of carotenoids in TX100 micelles: electron transfer and a large blue shift

Author

Kispert, Lowell D. and He, Zhangfei

Subjects
Carotenoids -- Research, Electron transport -- Research, Micelles -- Research, Chemicals, plastics and rubber industries
Abstract

Issues concerning the oxidation waves of 8'-apo-beta-caroten-8'-al and 8'-apo-beta-8'-nitrile in TX100 micelles are discussed. This work investigated the electron transfer of incorporated carotenoids to an electrode and the effect of water on carotenoids.

Published
1999

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