|
1
|
Murphy RS, Bohne C. Use of Styrene Radical Cations as Probes for the Complexation Dynamics of Charged Guests with α- and β-Cyclodextrins. Photochem Photobiol 2007. [DOI: 10.1562/0031-8655(2000)0710035uosrca2.0.co2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
|
|
2
|
Pace TCS, Monahan SL, MacRae AI, Kaila M, Bohne C. Photophysics of aminoxanthone derivatives and their application as binding probes for DNA. Photochem Photobiol 2006; 82:78-87. [PMID: 16097858 DOI: 10.1562/2005-05-16-ra-529] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
Xanthones with amino substituents were synthesized to diminish the photoreactivity of the xanthone chromophore with DNA, with the objective of using these molecules to study their binding dynamics with DNA. The aminoxanthones showed a strong solvatochromic effect on their singlet and triplet excited-state photophysics, where polar solvents led to a decrease of the energies for the excited states. Quenching of the triplet excited states by nitrite anions was used to determine the binding dynamics, and a residence time in the microsecond time domain was estimated for the bound 2-aminoxanthone with DNA. The quenching experiments performed showed that this methodology will not be applicable to study the binding dynamics of a wide variety of guests with DNA.
Collapse
Affiliation(s)
- Tamara C S Pace
- Department of Chemistry, University of Victoria, Victoria, BC, Canada
| | | | | | | | | |
Collapse
|
|
4
|
Song KS, Hou CR, Liu L, Li XS, Guo QX. A quantum-chemical study on the molecular recognition of β-cyclodextrin with ground and excited xanthones. J Photochem Photobiol A Chem 2001. [DOI: 10.1016/s1010-6030(01)00385-9] [Citation(s) in RCA: 20] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
|
|
5
|
Okano LT, Barros TC, Chou DTH, Bennet AJ, Bohne C. Complexation Dynamics of Xanthone and Thioxanthone to β-Cyclodextrin Derivatives. J Phys Chem B 2001. [DOI: 10.1021/jp002622c] [Citation(s) in RCA: 41] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Affiliation(s)
- L. T. Okano
- Department of Chemistry, University of Victoria, P.O. Box 3065, Victoria, British Columbia, Canada, V8W 3V6, and Department of Chemistry, Simon Fraser University, 8888 University Drive, Burnaby, British Columbia, Canada V5A 1S6
| | - T. C. Barros
- Department of Chemistry, University of Victoria, P.O. Box 3065, Victoria, British Columbia, Canada, V8W 3V6, and Department of Chemistry, Simon Fraser University, 8888 University Drive, Burnaby, British Columbia, Canada V5A 1S6
| | - D. T. H. Chou
- Department of Chemistry, University of Victoria, P.O. Box 3065, Victoria, British Columbia, Canada, V8W 3V6, and Department of Chemistry, Simon Fraser University, 8888 University Drive, Burnaby, British Columbia, Canada V5A 1S6
| | - A. J. Bennet
- Department of Chemistry, University of Victoria, P.O. Box 3065, Victoria, British Columbia, Canada, V8W 3V6, and Department of Chemistry, Simon Fraser University, 8888 University Drive, Burnaby, British Columbia, Canada V5A 1S6
| | - C. Bohne
- Department of Chemistry, University of Victoria, P.O. Box 3065, Victoria, British Columbia, Canada, V8W 3V6, and Department of Chemistry, Simon Fraser University, 8888 University Drive, Burnaby, British Columbia, Canada V5A 1S6
| |
Collapse
|
|
6
|
Murphy RS, Bohne C. Use of styrene radical cations as probes for the complexation dynamics of charged guests with alpha- and beta-cyclodextrins. Photochem Photobiol 2000; 71:35-43. [PMID: 10649887 DOI: 10.1562/0031-8655(2000)071<0035:uosrca>2.0.co;2] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
The complexation dynamics of radical cations with cyclodextrins (CD) was studied using photophysical techniques. Radical cations of 4-vinylanisole and trans-anethole were formed within alpha- and beta-CD cavities by two-photon photolysis of the respective styrene precursors. Exit of the radical cations from alpha-CD complexes with 1: 1 and 1:2 (guest: CD) stoichiometries and beta-CD complexes with 1:1 stoichiometries occurred with lifetimes shorter than 100 ns. Most of the radical cations formed escape from the CD cavities, but a small portion do react with alpha-CD when this host is present in high concentrations.
Collapse
Affiliation(s)
- R S Murphy
- Department of Chemistry, University of Victoria, B.C., Canada
| | | |
Collapse
|