Two novel macrocyclic organotin(IV) carboxylates [(n-Bu2Sn)L1]2•C7H8 (1) (L1 = 2-(4-carboxyphenylcarbamoyl)benzoic acid) and [(n-Bu2Sn)L2]3•H2O (2) (L2 = 5-(1,3-dioxo-1,3-dihydro-isoindol-2-yl)-isophthalic acid) were generated by the reactions of dibutyltin oxide with amide dicarboxylic acids and characterized by elemental analysis, IR, 1H and 13C NMR spectroscopy. X-ray crystallography diffraction
两种新型大环有机锡(IV)羧酸盐[(n -Bu 2 Sn)L 1 ] 2 •C 7 H 8(1)(L 1 = 2-(4-羧基苯基氨基甲酰基)苯甲酸)和[(n- Bu 2 Sn )L 2 ] 3 •H 2 O(2)(L 2 = 5-(1,3-dioxo-1,3-dihydro-isoindol-2-yl)-间苯二甲酸)是由二丁基氧化锡与酰胺二羧酸,通过元素分析,IR,1 H和13进行表征13 C NMR光谱。X射线晶体衍射分析表明1是二核二羧酸盐环,而2是三核三羧酸盐大环。在分子间相互作用的帮助下,1和2构造了充满空腔的超分子3D架构。游离甲苯和水分子分别以1和2的形式位于腔中。热分析表明,配合物2在热方面比1更稳定。还研究了1和2的抗肿瘤活性。
Silicon-containing poly(esters) with halogenated bulky side groups. Synthesis, characterization and thermal studies
作者:L. H. Tagle、C. A. Terraza、A. Tundidor-Camba、D. Coll
DOI:10.1039/c5ra06896g
日期:——
Synthesis of poly(esters) X-PE-(a-c) and poly(esters) X-PE.
合成聚酯物质X-PE-(a-c)和聚酯物质X-PE。
Synthesis and Characterization of Triphenyltin(IV) Carboxylates with Isophthalic Acid and Benzoic Acid Derivatives: X-ray Crystal Structures of 1D Supramolecular Chains
the isophthalic acid and benzoicacid derivatives, 5-(1,3-dioxo-1,3-dihydro-isoindol-2-yl)-isophthalic acid (H2L1) and 4-(1,3-dioxo-1,3-dihydro-isoindol-2-yl)-benzoic acid (HL2) yielded the complexes [(SnPh3)2L1] (1) and [(SnPh3)L2] (2). All complexes were characterized by elemental analysis and FT-IR and NMR (1H, 13C, 119Sn) spectroscopy. Interestingly, the supramolecular structures of 1 and 2 are
Solvation controlling reaction paths and gel-formation in imide derivatives
作者:Devendra Singh、Jubaraj B. Baruah
DOI:10.1016/j.tetlet.2008.05.030
日期:2008.7
1,8-Naphthalic anhydride condenses with 4-nitro-1,2-diaminobenzene in acetic acid to give 11-nitrobenzo[d,e]benzo[2,1-a]isoquinoline-1,3-dione (1), whereas the same reaction carried out in DMF gives 2-(2-amino-4-nitrophenyl)-benzo[d,e]isoquinoline-1,3-dione (2). The condensation reaction of 1,8-naphthalic anhydride with 1-amino 3,5-benzene dicarboxylic acid leads to corresponding imide, which forms a gel in a mixed solvent such as water in DMSO. A similar compound 5-(1,3-dioxo-1,3-dihydroisoindol-2-yl)-isophthalic acid derived from phthalic anhydride forms gel in a mixed solvent of DMSO and water, whereas a crystalline solvate of DMSO with 2 could be obtained upon crystallization from DMSO. The crystal structure of this solvate is determined and its structure is compared with 2-(1,3-dioxo-1,3-dihydro-isoindol-2-yl)-benzoic acid. The latter does not form a gel in the mixed solvent and adopts an intermolecular hydrogen bonded structure. (C) 2008 Elsevier Ltd. All rights reserved.
Methods for the Imaging of Nucleic Acid Sequences
申请人:President and Fellows of Harvard College
公开号:US20200102591A1
公开(公告)日:2020-04-02
The present invention relates to methods of providing sequence specificity to in situ genome imaging at the level of the electron microscope (EM).