71437-80-4Relevant academic research and scientific papers
Guest responsivity of a two-dimensional coordination polymer incorporating a cholesterol-based co-ligand
Kajitani, Kazuki,Koshiyama, Tomomi,Hori, Akihiro,Ohtani, Ryo,Mishima, Akio,Torikai, Kohei,Ebine, Makoto,Oishi, Tohru,Takata, Masaki,Kitagawa, Susumu,Ohba, Masaaki
, p. 15893 - 15897 (2013)
To implement specific guest responsivity, a hydrophobic cholesterol-based co-ligand, cholest-5-en-3-yl-4-isonicotinate (Cholpy), was incorporated into a two-dimensional Hofmann-type Co(ii)Ni(ii) coordination polymer. The chemically programmed structure successfully demonstrated the unique guest response with remarkable chromatic changes.
Use of intermolecular hydrogen bonding to synthesize triple-shape memory supermolecular composites
Chen, Hongmei,Liu, Ye,Gong, Tao,Wang, Lin,Zhao, Keqing,Zhou, Shaobing
, p. 7048 - 7056 (2013)
We have developed a simple and controllable strategy to synthesize a triple-shape memory supermolecular composite (SMPU-INCh-n) through H-bonding interactions between a polymer and mesogenic units. The polymer is shape memory polyurethane (SMPU) with carb
Copper-catalyzed formal [1 + 2 + 2]-annulation of alkyne-tethered diazoacetates and pyridines: Access to polycyclic indolizines
Dong, Shanliang,Hu, Wenhao,Huang, Jingjing,Qiu, Lihua,Sha, Hongkai,Xu, Xinfang
supporting information, p. 1926 - 1932 (2020/03/23)
A copper-catalyzed formal [1 + 2 + 2]-annulation of alkyne-tethered diazo compounds with pyridines, which affords polycyclic fused indolizines in synthetically useful to good yields under mild reaction conditions, has been reported. This method features the use of an inexpensive copper catalyst and readily available starting materials, broad substrate generality, and operational simplicity. Notably, a variety of natural product derivatives are compatible under the current conditions, which shows significant potential of this method for the selective decoration and modification of analogous biomolecules or pharmaceuticals.
Synthesis and characterization of liquid-crystalline ionomers with pendant cholesteryl pyridinium salt mesogens
Zhao, Dongyu,Zhang, Lei,Bai, Lu,Luo, Jingqi,He, Xiaozhi,Meng, Fan-Bao
, p. 26791 - 26799 (2016/03/25)
Novel chiral liquid-crystalline (LC) bromo-polysiloxanes (IP, IIP and IIIP) were graft copolymerized in a one-step hydrosilylation reaction by use of polymethylhydrogenosiloxane, cholest-5-en-3-ol(3β)-10-undecenoate and 4-bromobut-1-ene. A pyridyl-containing LC monomer cholesteryl isonicotinate (CIN) was synthesized and characterized. Some LC ionomers [IP-IIIP-Py][X] (X = Br) were synthesized by use of CIN and the bromo-polysiloxanes. Other LC ionomers [IP-IIIP-Py][X] (X = BF4, PF6, Tf2N) were prepared by metathesis of the pyridinium bromides. The chemical structure and liquid-crystalline properties were investigated by various experimental techniques. All the bromo-polysiloxanes display a smectic A (SA) mesophase when they are heated and cooled, while all these LC ionomers show a chiral smectic C (S?C) phase on heating, and exhibit SA and S?C phases on cooling. The LC ionomers show a narrower range of LC temperature than the corresponding bromo-polysiloxanes. For the LC ionomers bearing homologous pyridinium cations and different anions, the glass transition temperature, mesophase-isotropic phase transition temperature and LC temperature range tend to reduce, and the spontaneous polarization value increases slightly in the sequence of Br-, BF4-, PF6-, and Tf2N-. Rearrangement of smectic layers due to electrostatic attraction and ion aggregation of cholesteryl pyridinium salt mesogens lead to the formation of the S?C phase for these LC ionomers.
