Design and Synthesis of Porphyrins Bearing Rigid Hydrogen Bonding Motifs: Highly Versatile Building Blocks for Self-Assembly of Polymers and Discrete Arrays
作者:Xinxu Shi、Kathleen M. Barkigia、Jack Fajer、Charles Michael Drain
DOI:10.1021/jo010108c
日期:2001.10.1
complementary porphyrin building blocks, it is possible to build various types of multi-porphyrin supramolecules with different spatial relationships in predefined geometries. The formation and properties of self-complementary dimers and a closed tetrameric square are presented as a basis of comparison to the latter system in the solidstate. An X-ray structure of 5,10-bis(4-tert-butylphenyl)-15,20-bis(3,
Associative polymers for use in a flow and related compositions, methods and systems
申请人:CALIFORNIA INSTITUTE OF TECHNOLOGY
公开号:US10428286B2
公开(公告)日:2019-10-01
Described herein are associative polymers capable of controlling a physical and/or chemical property of non-polar compositions that can be used when the non-polar composition is in a flow, and related compositions, methods and systems. Associative polymers herein described have a non-polar backbone with a longest span having a molecular weight that remains substantially unchanged under the flow conditions and functional groups presented at ends of the non-polar backbone, with a number of the functional groups presented at the ends of the non-polar backbone formed by associative functional groups capable of undergoing an associative interaction with another associative functional group with an association constant (k) such that the strength of each associative interaction is less than the strength of a covalent bond between atoms and in particular less than the strength of a covalent bond between backbone atoms.
ASSOCIATIVE POLYMERS FOR USE IN A FLOW AND RELATED COMPOSITIONS, METHODS AND SYSTEMS
申请人:CALIFORNIA INSTITUTE OF TECHNOLOGY
公开号:US20170081466A1
公开(公告)日:2017-03-23
Described herein are associative polymers capable of controlling a physical and/or chemical property of non-polar compositions that can be used when the non-polar composition is in a flow, and related compositions, methods and systems. Associative polymers herein described have a non-polar backbone with a longest span having a molecular weight that remains substantially unchanged under the flow conditions and functional groups presented at ends of the non-polar backbone, with a number of the functional groups presented at the ends of the non-polar backbone formed by associative functional groups capable of undergoing an associative interaction with another associative functional group with an association constant (k) such that the strength of each associative interaction is less than the strength of a covalent bond between atoms and in particular less than the strength of a covalent bond between backbone atoms.
ASSOCIATIVE POLYMERS AND RELATED COMPOSITIONS, METHODS AND SYSTEMS
申请人:CALIFORNIA INSTITUTE OF TECHNOLOGY
公开号:US20200247977A1
公开(公告)日:2020-08-06
Described herein are associative polymers capable of controlling one or more physical and/or chemical properties of non-polar compositions and related compositions, methods and systems.