Steric and Electronic Effects in Capsule-Confined Green Fluorescent Protein Chromophores
作者:Anthony Baldridge、Shampa R. Samanta、Nithyanandhan Jayaraj、V. Ramamurthy、Laren M. Tolbert
DOI:10.1021/ja1094606
日期:2011.2.2
The turn-on of emission in fluorescent protein chromophores sequestered in an "octaacid" capsule is controlled by stereoelectronic effects described by a linear free energy relationship. The stereochemical effects are governed by both the positions and volumes of the aryl substituents, while the electronic effects, including ortho effects, can be treated with Hammett sigma parameters. The use of substituent volumes rather than A values reflects packing of the molecule within the confines of the capsule.
Activation of Fluorescent Protein Chromophores by Encapsulation
作者:Anthony Baldridge、Shampa R. Samanta、Nithyanandhan Jayaraj、V. Ramamurthy、Laren M. Tolbert
DOI:10.1021/ja908870k
日期:2010.2.10
Chromophores related to fluorescent proteins, when sequestered into the "octaacid" capsule, recover their fluorescence, The fluorescence recovery is related to the inhibition of torsional motions within the cavity, implicating the single-bond torsion as an important contributor to internal conversion within this important class of chromophores.