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Regioisomeric Tandem Triblock Shape Amphiphiles Based on Polyhedral Oligomeric Silsesquioxanes
Author(s) -
Shao Yu,
Yin Hang,
Jin PengFei,
Jiang YuSheng,
Yang Shuguang,
Zhang WenBin
Publication year - 2018
Publication title -
chemistry – a european journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.687
H-Index - 242
eISSN - 1521-3765
pISSN - 0947-6539
DOI - 10.1002/chem.201800895
Subject(s) - silsesquioxane , structural isomer , macromolecule , amphiphile , tandem , self assembly , chemistry , amorphous solid , crystallization , crystallography , materials science , polymer chemistry , copolymer , stereochemistry , organic chemistry , polymer , biochemistry , composite material
We report the design, synthesis and self‐assembly of a series of tandem triblock shape amphiphile regioisomers composed of one rod‐like fluorinated polyhedral oligomeric silsesquioxane (FPOSS) cage tethered with two spherical tert ‐butyl‐POSS ( t BPOSS) cages in para ‐, meta ‐, and ortho ‐configurations. Precision syntheses are achieved through sequential “click” reactions and the compounds are thoroughly characterized by combined techniques of NMR, FT‐IR and MALDI‐TOF MS spectroscopy. Only the ortho ‐isomer forms an ordered lamellae structure induced by the crystallization of perfluoroalkyl‐chains and the other two remain amorphous due to frustrated packing by unfavorable regio‐configuration. The distinct assembly behaviors of these three regioisomers reflect the delicate influence of a minute structural difference on precision macromolecular assembly.