Novel self-reproducing giant vesicles, consisting of a vesicular amphiphile with an imine group in its hydrophobic chain, were constructed. This vesicular amphiphile, the product of a dehydrocondensation reaction between amphiphilic aldehyde and a lipophilic aniline derivative, could be prepared within the giant vesicles. When a protected form of the aldehyde precursor was added to a suspension of giant vesicles containing the lipophilic aniline precursor and a catalyst, dehydrocondensation between the two precursors took place inside the vesicles and produced the same amphiphile as the one which constitutes the original vesicle. The newly formed amphiphiles self-assembled in the inner water pool to form small vesicles, which were eventually extruded through the outer layer of the original vesicle to the bulk water. Accordingly, this kinetic system can be designated as a self-reproducing system of giant vesicles.
Novel thiol-terminated bent-core liquid crystals (LCs) are used to decorate gold nanoparticles. Thioacetate or xanthate/xanthogenate functional groups are used to effect the attachment of the LCs to the gold nanoparticles. Such bent-core decorated nanoparticles may be dissolved in bent-core liquid crystal host media to provide polarizable systems which respond quickly to applied electric fields and exhibit other interesting and useful optical and electro-optic behaviour.
A new homologous series of mesogens containing 6-amino-1,3-dimethyluracil moiety have been synthesized. The structures of the compounds were characterised by elemental analysis, FT-IR, 1H and 13C NMR spectroscopic techniques. Their mesomorphic properties were studied by polarising optical microscopy attached to a heating stage. Microscopy data were supported with transition temperatures and enthalpy
已经合成了包含6-氨基-1,3-二甲基尿嘧啶部分的新的同源的介晶系列。化合物的结构通过元素分析,FT-IR,1 H和13 C NMR光谱技术表征。通过连接到加热台的偏振光学显微镜研究了它们的介晶性质。从差示扫描量热分析获得的转变温度和焓变值支持了显微镜数据。研究表明,化合物的介晶性质取决于烷氧基间隔基的长度。具有较短烷氧基-间隔链(n = 6)的化合物4a-f表现出近晶A相,而化合物4g-r 烷氧基-间隔链(n = 8或10)显示向列相。
A highly efficient artificial light-harvesting system with two-step sequential energy transfer based on supramolecular self-assembly
作者:Guangping Sun、Weirui Qian、Jianmin Jiao、Tingting Han、Yukun Shi、Xiao-Yu Hu、Leyong Wang
DOI:10.1039/d0ta03169k
日期:——
A highly efficient artificial light-harvesting system (ALHS) in the aqueous phase with a two-step sequential energy transfer process has been successfully constructed based on the host–guest interaction between a water-soluble pillar[5]arene (WP5) and a bola-type bis(4-phenyl)acrylonitrile derivative (BPT), as well as two different hydrophobic fluorescent dyes (4,7-bis(thien-2-yl)-2,1,3-benzothiadiazole
Rhodium(<scp>ii</scp>) catalyzed synthesis of macrocycles incorporating oxindole via O–H/N–H insertion reactions
作者:Sengodagounder Muthusamy、Thangaraju Karikalan
DOI:10.1039/c4ob01671h
日期:——
an oxindole unit were synthesized in good yield via rhodium(II) acetate dimer catalyzed intramolecular O–H/N–H insertion reactions. Interestingly, synthesis of C2-symmetric macrocycles in moderate yield was also demonstrated via head to tail dimerization involving double intermolecular O–H insertion when the spacer length was decreased. The synthesis of chiral macrocycles was also delineated. This study