Computed Properties of C11H21BrO2. The fused heterocycle is formed by combining a benzene ring with a single heterocycle, or two or more single heterocycles. Compound: 11-Bromoundecanoic acid, is researched, Molecular C11H21BrO2, CAS is 2834-05-1, about Rhodamine-Installed Polynorbornenes: Molecular Design, Structure, and Stimuli-Responsive Properties. Author is Vaidya, Samiksha; Sharma, Meenakshi; Bruckner, Christian; Kasi, Rajeswari M..
The synthesis of a number of tailored architectures of rhodamine dye-norbornene conjugate monomers and corresponding homopolymers derived from them is described. The impact of the monomer architecture on the mechanochromic, photochromic, and thermochromic properties of rhodamine-modified polynorbornenes is reported. Color changes were caused by the reversible interconversion between the “”open”” and “”closed”” spirolactam form of the covalently attached dye. Monomers were synthesized in two principle architectures that varied on: (1) the number of polymerizable norbornene groups tethered to a bifunctional rhodamine dye; (2) the presence of flexible methylene spacers between the dye and the polymerizable norbornene groups. Introduction of norbornene groups on each of the two hydroxy groups of a bifunctional rhodamine resulted in a crosslinked polymer that exhibited better mechanochromic, photochromic, and thermochromic properties compared to the corresponding polymer without crosslinks, derived from the derivatization of bifunctional rhodamine with only one norbornene. The introduction of flexible methylene spacers between the two polymerizable norbornenes and the dye mol. resulted in a polymeric framework with rapidly reversible color-changing properties upon mech. or photostimulation. The ideal monomer mol. structure, whereby (1) attaching norbornene on both sides of the rhodamine dye and (2) methylene spacers between the dye and norbornenes on both sides afforded the nonpareil polymer structure that was capable of thermoreversible mechanochromic and photochromic features, and irreversible thermochromic features. These new materials may find utility as multi-stimuli-responsive soft materials.
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Metal catalyst and ligand design,
Ligand Template Strategies for Catalyst Encapsulation – NCBI