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Article: The structure, photochemical reactivity, and photophysical properties of adamantyl X-substituted aryl ethers and a comparison with the alkyl groups, methyl, tert-butyl, and allyl (1).
- Article from:
- Canadian Journal of Chemistry
- Article date:
- September 1, 2005
- Author:
CopyrightCOPYRIGHT 2005 NRC Research Press. This material is published under license from the publisher through the Gale Group, Farmington Hills, Michigan. All inquiries regarding rights should be directed to the Gale Group. (Hide copyright information)
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Introduction
The effect that substituents (X) on aromatic rings (Ar) have on the quantum yields and rate constants of bond cleavage reactions from photochemically generated excited singlet states of substrates of the general class ArY-Z, where the Y--Z bond is the reactive one, continue to attract interest. The objective is to develop excited state structure--reactivity relationships, like the Hammett equation, that are well-established for ground-state reactions. Related to this goal has been one of understanding, in the excited-state cases, the competition between the formation of the products derived from radical pairs (from homolytic cleavage of the Y--Z ...
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... ... different association and dissociation rate constants toward ifnar1-EC and ifnar2-EC ... spectroscopy. Surface dissociation rate constants were determined by measuring ligand ... approximately three-times lower dissociation rate constants were observed for both receptor subunits ...
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