An efficient synthesis of 4,4′,5,5′-tetraiododibenzo-24-crown-8 and its highly conjugated derivatives
摘要:
4,4',5,5'-Tetraiododibenzo-24-crown-8 (9), a practical building block, was prepared under efficient and mild reaction conditions starting from the simple starting material, catechol (1). Highly conjugated 4,4',5,5'-tetraethynyldibenzo-24-crown-8 (10a,b) were prepared via a Sonogashira, coupling reaction from tetraiodocrown ether 9. These highly conjugated crown ethers form complexes in CD2Cl2 with dibenzylammonium hexafluorophosphate in a 1:1 ratio. Emission spectrum of pseudorotaxane 11 shows a dramatic shift from the non-complexed precursor. (c) 2005 Elsevier Ltd. All rights reserved.
SELF-ASSEMBLED MONOLAYERS AND METHODS FOR USING THE SAME IN BIOSENSING APPLICATIONS
申请人:Dussault Patrick H.
公开号:US20120315625A1
公开(公告)日:2012-12-13
Cross-linked amphiphile constructs that form self-assembled monolayers (SAMs) on metal surfaces such as gold surfaces are disclosed. These new SAMs generate well packed and highly oriented monolayer films on gold surfaces. A method for using the SAMs in the fabrication of biomolecule sensors is also disclosed.
Regioselective Synthesis of Tetraalkynylarenes by Consecutive Dual Sonogashira Coupling Reactions of the Bis(triflate) of 4,5-Diiodobenzene-1,2-diol
作者:Thomas J. Fisher、Patrick H. Dussault
DOI:10.1002/ejoc.201200079
日期:2012.5
The regioselectivesynthesis of nonsymmetric tetraalkynylarenes has been readily achieved through consecutive sets of Sonagashira cross-coupling reactions of the bis(triflate) derivative of 4,5-diiodobenzene-1,2-diol. The initial couplingreactions proceeded with nearly complete selectivity for the reaction at the Ar–I linkages. Subsequent couplingreactions at the Ar–OTf linkages were efficiently
A phase-dependent photoluminescent discotic liquid crystal bearing a graphdiyne substructure
作者:Zhen Yu、Xu-Man Chen、Zhi-Yang Liu、Meng Wang、Shuai Huang、Hong Yang
DOI:10.1039/d0cc05959e
日期:——
attracted tremendous scientific attention. Here we design and synthesize a graphdiyne-derived discoticliquidcrystal material by decorating six wedge-shaped 3,4,5-tris(dodecyloxy)benzoate groups on the fundamental structural unit of graphdiyne, the dehydrotribenzo[18]annulene core. This graphdiyne-derived liquidcrystal material exhibits a cubic phase and a hexagonal columnar phase at varied temperatures
Bergman cyclopolymerization within the channels of functional hybrid nanocomposites formed by co-assembly of silica and polymerizable surfactant monomer
The Bergman cyclopolymerization of polymerizable surfactant monomer was carried out within the hexagonal channels of functional hybrid nanocomposite formed by co-assembly with silica.
Stereospecific Epitaxial Growth of Bilayered Porous Molecular Networks
作者:Yuan Fang、Benjamin D. Lindner、Iris Destoop、Takashi Tsuji、Zhenzhe Zhang、Rustam Z. Khaliullin、Dmitrii F. Perepichka、Kazukuni Tahara、Steven De Feyter、Yoshito Tobe
DOI:10.1021/jacs.0c00108
日期:2020.5.13
Bias voltage-dependent scanningtunnelingmicroscopy (STM) experiments revealed the diastereoselectivity of the bilayer with respect to both the intrinsic chirality of the building blocks and the supramolecular chirality of the self-assembled networks. Top and bottom layers within the same crystalline domain were composed of the same enantiomers but displayed opposite supramolecular chiralities.