Hydrogen‐Bonding Donor‐Acceptor Stenhouse Adducts
نویسندگان
چکیده
منابع مشابه
Design and synthesis of donor-acceptor Stenhouse adducts: a visible light photoswitch derived from furfural.
The development of an easily synthesized, modular, and tunable organic photoswitch that responds to visible light has been a long-standing pursuit. Herein we provide a detailed account of the design and synthesis of a new class of photochromes based on furfural, termed donor-acceptor Stenhouse adducts (DASAs). A wide variety of these derivatives are easily prepared from commercially available s...
متن کاملPhotochromic switching behaviour of donor-acceptor Stenhouse adducts in organic solvents.
We report photochromic donor-acceptor Stenhouse adducts (DASAs) capable of fully reversible photoisomerization with visible light in organic solvents including chloroform, acetonitrile and benzene. The rates of photoisomerization and thermal reversion can be tuned by altering the electronics of the donor adduct. X-Ray crystallography and photo-NMR experiments unambiguously establish molecular s...
متن کاملIrreversible Bleaching of Donor–Acceptor Stenhouse Adducts on the Surfaces of Magnetite Nanoparticles
Donor–acceptor Stenhouse adducts (DASAs) have recently emerged as a new class of photoswitchable molecules. 2] These compounds feature a system of three conjugated C=C double bonds connecting an aliphatic amine “donor” and a 1,3-dicarbonyl “acceptor”, giving rise to an intense absorption in the visible (green) region. DASAs serve as an example of negative photochromic materials : exposing the t...
متن کاملShedding Light on the Photoisomerization Pathway of Donor–Acceptor Stenhouse Adducts
Donor-acceptor Stenhouse adducts (DASAs) are negative photochromes that hold great promise for a variety of applications. Key to optimizing their switching properties is a detailed understanding of the photoswitching mechanism, which, as yet, is absent. Here we characterize the actinic step of DASA-photoswitching and its key intermediate, which was studied using a combination of ultrafast visib...
متن کاملThe synthesis and purification of amphiphilic conjugated donoracceptor block copolymers
Nanoscale domains of donor and acceptor materials are crucial for charge generation in organic photovoltaic devices. These domains are difficult to achieve reproducibly in blended materials, but could be engineered into single-material active layers composed of donor–acceptor block copolymers (BCPs). In this work, we report the synthesis and purification of two novel fully conjugated BCPs, P3HT...
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ژورنال
عنوان ژورنال: ChemPhotoChem
سال: 2020
ISSN: 2367-0932,2367-0932
DOI: 10.1002/cptc.201900295