Photoacidic and Photobasic Behavior of Transition Metal Compounds with Carboxylic Acid Group(s)
作者:Ryan M. O’Donnell、Renato N. Sampaio、Guocan Li、Patrik G. Johansson、Cassandra L. Ward、Gerald J. Meyer
DOI:10.1021/jacs.6b00454
日期:2016.3.23
Excited state proton transfer studies of six Ru polypyridyl compounds with carboxylic acid/carboxylate group(s) revealed that some were photoacids and some were photobases. The compounds [Ru(II)(btfmb)2(LL)](2+), [Ru(II)(dtb)2(LL)](2+), and [Ru(II)(bpy)2(LL)](2+), where bpy is 2,2'-bipyridine, btfmb is 4,4'-(CF3)2-bpy, and dtb is 4,4'-((CH3)3C)2-bpy, and LL is either dcb = 4,4'-(CO2H)2-bpy or mcb =
Copper(<scp>ii</scp>)-directed synthesis of neutral heteroditopic [2]rotaxane ion-pair host systems incorporating hydrogen and halogen bonding anion binding cavities
作者:Asha Brown、Katrina M. Mennie、Owen Mason、Nicholas G. White、Paul D. Beer
DOI:10.1039/c7dt02832f
日期:——
Neutral heteroditopic [2]rotaxane ion-pair host systems were synthesised via a Cu(II) directed passive metal template strategy. Each rotaxane contains discrete, axle-separated interlocked bindingsites for a guest anion and a transition metal countercation. The anionbindingsites are composed of convergent X–H (X = C, N) hydrogen bond donor groups, or mixed X–H and C–I hydrogen and halogen bond donor
通过Cu(II)定向的被动金属模板策略合成了中性异位双[2]轮烷离子对宿主系统。每个轮烷均包含离散的,轴分隔的互锁的结合位点,用于客体阴离子和过渡金属抗衡阳离子。阴离子结合位点由会聚的X–H(X = C,N)氢键供体基团,或混合的X–H和C–1氢和卤素键供体基团组成,而等效的三维阵列的胺,吡啶羰基氧供体基团构成过渡金属结合位点。在CDCl 3 / CD 3 OD或CDCl 3 / CD 3 OD / D 2中的1 H NMR滴定实验O溶剂混合物表明,异位[2]轮烷主系统能够在存在共键合的Zn(II)阳离子的情况下进行协同阴离子识别。
Inhibition of Histone Demethylases by 4-Carboxy-2,2′-Bipyridyl Compounds
作者:Kai-Hsuan Chang、Oliver N. F. King、Anthony Tumber、Esther C. Y. Woon、Tom D. Heightman、Michael A. McDonough、Christopher J. Schofield、Nathan R. Rose
DOI:10.1002/cmdc.201100026
日期:2011.5.2
epigenetics: 2‐Oxoglutarate (2OG)‐dependent histone lysine demethylases, such as JMJD2E, are potential therapeutic targets in a range of diseases. Through structure–activity relationship studies and analyses, we identified a potent 4‐carboxy‐2,2′‐bipyridyl compound, which inhibits JMJD2E with an IC50 value of 110 nM, representing a 66‐fold improvement over the lead compound. These bipyridyl derivatives bind
利用表观遗传学: 2-氧戊二酸 (2OG) 依赖性组蛋白赖氨酸脱甲基酶,如 JMJD2E,是一系列疾病的潜在治疗靶点。通过构效关系研究和分析,我们确定了一种有效的 4-羧基-2,2'-联吡啶化合物,其抑制 JMJD2E 的 IC 50值为 110 n M,比先导化合物提高了 66 倍。这些联吡啶衍生物在 2-酮戊二酸结合位点结合。
Pigment-Acceptor-Catalyst Triads for Photochemical Hydrogen Evolution
作者:Kyoji Kitamoto、Ken Sakai
DOI:10.1002/anie.201311209
日期:2014.4.25
photosynthesis is dramatically improved by introducing multiviologen tethers to temporarily collect the high‐energy electron generated in the first photoinduced step. These are unique examples of “pigment–acceptor–catalysttriads”, which demonstrate a new effective type of artificial photosynthesis.