三种双核μ-氧化双{dioxidomolybdenum(VI)}配合物[[μ-O] {Mo VI O 2(MeOH)} 2(L 1)] 1,[(μ-O){Mo VI O 2(MeOH) } 2(L 2)] 2和[(μ-O){Mo VI O 2(MeOH)} 2(L 3)] 3具有潜在的二元四齿嗪配体[H 2 L 1 =水杨醛的嗪,H 2 L 2 = 3-甲氧基水杨醛的嗪和H 2 L 3报道了[3,5-二叔丁基水杨醛的嗪]。通过元素分析,各种光谱技术(FT-IR,UV-Vis,1 H和13 C NMR),热重分析和单晶X射线衍射(2和3)研究来表征复合物。这些络合物是双核的,具有μ-O{MoO 2 } 2核,其中配体通过一组酚氧和嗪氮配位至每个钼,从而表现为双(双齿)。研究了这些络合物作为使用30%H 2 O 2氧化两种双环醇(酚醇和异冰片醇)的催化剂NEt 3作为添加剂存在时作为氧化剂。添加剂中双环醇的转化顺序如下:NEt
Verhalten rhodanierter Schiffscher Basen gegenüber Raney-Nickel, Hydrazin und Alkalien. 11. Mitt.: Über organische Rhodanverbindungen
作者:R. Poholoudek-Fabini、D. Fröhling
DOI:10.1002/ardp.19652980705
日期:——
In Gegenwart von Raney‐Nickel als Wasserstoffüberträger findet eine Hydrierung der Azomethinfunktion erst mit sehr großem Überschuß an Metallkatalysator statt, wobei die Rhodangruppe unter Eliminierung des Schwefels quantitativ abgespalten wird. Raney‐Nickel ohne Zufuhr von Wasserstoff führt durch unvollständige Desulfurierung zu Sulfiden. — Mit Hydrazin erfolgt keine Reduktion, sondern Aufspaltung
Three binuclear cyclometalated PtII complexes, [(ppy)Pt(µ-SA)Pt(ppy)] (ppy = 2-phenylpyridine, SA: salicylaldehyde azine), have been synthesized and characterized. Owing to the blockage of the intramolecular rotation of the bridging SA ligands, all three complexes exhibit propeller-type enantiomers and aggregation-induced phosphorescence (AIP). Interestingly, one complex with –NEt2 groups instead of
Cascade detection of fluoride and bisulphate ions by newly developed hydrazine functionalised Schiff bases
作者:Suvojit Roy、Provakar Paul、Monaj Karar、Mayank Joshi、Suvendu Paul、Angshuman Roy Choudhury、Bhaskar Biswas
DOI:10.1016/j.molliq.2021.115293
日期:2021.3
increases sharply from the chemosensor to chemosensor–F− adduct (17% to 28%) leading to deprotonation of one hydroxyl group and consequently involvement in conjugation impeding the CN isomerisation. Thus, the hydroxyl proton captured by F− restricts the CN isomerisation as well as ICT character of both the chemosensors and confirms the cascade sensing mechanism for fluoride and bisulphate ions.
AIE-active salicylaldehyde azines (SAs) display strong blue, green, and red fluorescence with large Stokes shifts in MeCN–water and solid medium and can be used as ratiometric fluorescent pH probes in water and test paper.
Improvement in Titanium Complexes Bearing Schiff Base Ligands in the Ring-Opening Polymerization of <i>L</i>-Lactide: A Dinuclear System with Hydrazine-Bridging Schiff Base Ligands
作者:Hsi-Ching Tseng、Hsing-Yin Chen、Yen-Tzu Huang、Wei-Yi Lu、Yu-Lun Chang、Michael Y. Chiang、Yi-Chun Lai、Hsuan-Ying Chen
DOI:10.1021/acs.inorgchem.5b02590
日期:2016.2.15
LA coordination with Ti atom, thereby reducing catalyticactivity. All the dinuclear Ticomplexes exhibited higher catalyticactivity (approximately 10–60-fold) than mononuclear LCl–H-TiOPr2 did. The strategy of bridging dinuclear Ticomplexes with isopropoxide groups in the ROP of LA was successful, and adjusting the crowded heptacoordinated transition state by the bridging isopropoxide groups may be