Systematic evaluation of textural properties, activation temperature and gas uptake of Cu2(pzdc)2L [L = dipyridyl-based ligands] porous coordination pillared-layer networks
作者:Omar J. García-Ricard、Juan C. Silva-Martínez、Arturo J. Hernández-Maldonado
DOI:10.1039/c2dt30749a
日期:——
storage and separations at roomtemperature. All of the materials exhibited considerable selectivity toward CO2, particularly at moderate pressures. Meanwhile, CO2 isosteric heats of adsorption indicated that the porefunctionalities arising from the pillar ligands provided similar interactions with the adsorbate in the cases of CPL-4 and -5. For CPL-6, the presence of the carbonyl (CO) group appeared
A convenient synthesis of substituted pyridylgycols promoted by aqueous titanium trichloride
作者:Angelo Clerici、Ombretta Porta
DOI:10.1016/s0040-4020(01)91888-5
日期:1983.1
with two-equiv. of aqueoustitaniumtrichloride add to the carbonylcarbon atom of simple ketones (acetone, cyclopentanone, cyclohexanone) and aldehydes (acetaldehyde, propionaldehyde, benzaldehyde) affording subatituted pyridylglycols in very good yields. The present one-pot method has considerable advantage over the existing procedure. The reaction is discussed in terms of a radical mechanism in which
Supramolecular Synthon Promiscuity in Phosphoric Acid–Dihydrogen Phosphate Ionic Cocrystals
作者:Molly M. Haskins、Matteo Lusi、Michael J. Zaworotko
DOI:10.1021/acs.cgd.2c00150
日期:2022.5.4
we report a combined experimental and CSD study on a class of cocrystals that, although present in approved drug substances, remains understudied from a crystal engineering perspective: ionic cocrystals composed of dihydrogen phosphate (DHP) salts and phosphoric acid (PA). Ten novel DHP:PA ionic cocrystals were prepared from nine organic bases (4,4′-bipyridine, 5-aminoquinoline, 4,4′-azopyridine, 1
作为药物开发中的主要候选药物,大约 80% 的活性药物成分 (API) 表现出低水溶性,这通常会导致此类 API 吸收不良并表现出低生物利用度。可电离 API 的盐以及最近的药物共晶体可以解决低溶解度和其他相关物理化学特性的问题。药物共晶可以通过晶体工程进行设计,因为超分子合成子,特别是那些由氢键维持的合成子,可以通过计算模型或剑桥结构数据库(CSD)挖掘来预测。在这篇文章中,我们报告了对一类共晶的综合实验和 CSD 研究,尽管该类共晶存在于已批准的原料药中,但从晶体工程的角度来看,该类共晶仍处于研究不足的状态:由磷酸二氢 (DHP) 盐和磷酸 (PA) 组成的离子共晶。由九种有机碱(4,4'-联吡啶、5-氨基喹啉、4,4'-偶氮吡啶、1,4-二氮杂双环[2.2.2]辛烷、哌嗪、1,2-双(4-吡啶基)乙烷、1,2-双(4-吡啶基)二甲苯、1,2-二(4-吡啶基)-1,2-乙二醇和异喹啉-
Hydrogen and halogen bonding drive the orthogonal self-assembly of an organic framework possessing 2D channels
Orthogonal self-assembly of an open organic framework showing 2D channels has been obtained by combining hydrogen and halogen bonding. The framework is able to host various guest molecules with a diverse set of steric demands and substitution patterns, and survives single-crystal-to-single-crystal guest exchanges from liquid and gas phases.