Synthesis and Reaction Chemistry of Sb(<i>E</i>CH<sub>2</sub>CH<sub>2</sub>NMe<sub>2</sub>)<sub>3</sub>(<i>E</i>= O, S)
作者:Graeme A. Horley、Gabriele Kociok-Köhn、Kieran C. Molloy、Jorge Rodriguez Castro、Sergio Morreale
DOI:10.1002/zaac.201200024
日期:2012.9
Sb(ECH 2CH 2NMe 2) 3 [E = O (1), S (2)] were synthesized and their ability to form adducts with other metal moieties investigated. Compound 1 forms 1:1 adducts with NiI 2 (3) and M(acac) 2 [M = Cd (4), Ni (5)], while 2 undergoes ligand exchange with AlMe 3 to afford Me 2AlSCH 2CH 2NMe 2 (6). The structures of 2-4 and 6 were determined. Compound 2 incorporates three S, N-chelating ligands though the interaction
合成了锑氨基醇盐和氨基硫醇盐 Sb(ECH 2CH 2NMe 2) 3 [E = O (1), S (2)],并研究了它们与其他金属部分形成加合物的能力。化合物 1 与 NiI 2 (3) 和 M(acac) 2 [M = Cd (4), Ni (5)] 形成 1:1 加合物,而 2 与 AlMe 3 进行配体交换,得到 Me 2AlSCH 2CH 2NMe 2 (6 )。确定了2-4和6的结构。化合物 2 包含三个 S、N 螯合配体,但与氮的相互作用比在类似的醇盐配合物中弱。产物 3 表明一种碘已从镍迁移到锑,并且所有三种醇盐配体都通过 μ 2-O 原子桥接了两种金属。相比之下,在 4 中,只有一种醇盐连接锑和镉。化合物6采用相同的结构,螯合S,N配体在铝处产生四面体中心,
Methylation of Tethered Thiolates in [(bme-daco)Zn]<sub>2</sub> and [(bme-daco)Cd]<sub>2</sub> as a Model of Zinc Sulfur-Methylation Proteins
作者:Craig A. Grapperhaus、Thawatchai Tuntulani、Joseph H. Reibenspies、Marcetta Y. Darensbourg
DOI:10.1021/ic971599f
日期:1998.8.1
The dimeric dithiolate complex [1,5-bis(mercaptoethyl)-1,5-diazacyclooctanato]zinc(II), [(bme-daco)Zn](2) or Zn-1, and its cadmium analogue, Cd-1, were investigated as models for the active site of zinc-dependent methylation proteins. The key issue addressed was whether alkylation of a thiolate in a relatively rigid tetradentate ligand would result in coordination of the thioether product to the metal
Chelate Ring Size Effect as a Factor of Selective Fluorescent Recognition of Zn<sup>2+</sup> Ions by Pyrrolo[2,3-<i>b</i>]quinoxaline with a Substituted 2-Pyridyl Group Receptor
Analysis of the spectralproperties and structural differences of two turn-on ratiometric fluorescent receptors for Zn2+ and Cd2+ ions, derivatives of pyrrolo[2,3-b]quinoxaline (2), and earlier published 3 (Ostrowska et al. CrystEngComm2015, 17, 498–502) was performed. Both ligands are E/Z push–pull olefins interconverting at room temperature, with barriers to rotation about enamine double bonds, from
Zn 2+和Cd 2+离子,吡咯并[2,3- b ]喹喔啉的衍生物(2)和较早发表的3的两种开启比例荧光受体的光谱性质和结构差异的分析(Ostrowska et al。CrystEngComm 2015,17,498-502)进行。两种配体都是在室温下相互转化的E / Z推挽式烯烃,具有绕烯胺双键旋转的障碍,从E到Z的异构体为19.3±0.1和16.9±0.3 kcal / mol,从Z到E分别为16.9±0.3和15.7±0.2 kcal / mol。分离非对映异构体(E)-2和(Z)-2并通过X射线结构分析表征。通过(E / Z)-2与Zn 2+和Cd 2+的乙酸盐和乙酰丙酮化物形成的络合物分别通过紫外可见,荧光和1 H NMR滴定在乙腈中进行监测。相对于较早发表的(E)-3的分离的[(E)-2 ] 2 Zn的X射线结构分析-ZnOAc揭示了六配位锌离子与六和四元双-螯合环由(形成ë)
Synthesis, structure, and photophysical properties of luminescent zinc and cadmium complexes containing 2-pyridyl-substituted pyrrolo[2,3- b ]quinoxaline
作者:Katarzyna Ostrowska、Katarzyna Stadnicka、Marlena Gryl、Bogdan Musielak、Łukasz J. Witek、Oliwia Bocheńska
DOI:10.1016/j.poly.2017.05.037
日期:2017.9
N]-tridentate ligand containing 2-aminomethylpyridyl group at the enamino-pyrrolo[2,3-b]quinoxalin-2-one system (2) was synthesized and characterized. The reaction of ligand with zinc acetate and zinc acetylacetonate resulted in five-coordinated zinccomplexes: coordination polymer (E)-2-Zn(µ2-η1:η1-OAc) and (E)-2-ZnPyacac. Cadmium acetate and also acetylacetonate with the ligand both formed six-coordinated
Synthesis, photoconductivity and self-assembly of wurtzite phase Cu<sub>2</sub>Cd<sub>x</sub>Zn<sub>1−x</sub>SnS<sub>4</sub>nanorods
作者:Karthik Ramasamy、Xiaoyan Zhang、Robert D. Bennett、Arunava Gupta
DOI:10.1039/c2ra22503d
日期:——
Cu2CdxZn1âxSnS4 is a likely interfacial layer in Cu2ZnSnS4/CdS based thin film solar cells. It is thus important to investigate and understand the photoresponse behaviour of Cu2CdxZn1âxSnS4 in order to further improve the cell efficiency and to develop alternative buffer layer materials containing no heavy metals. We have synthesized monodispersed wurtzite phase Cu2CdxZn1âxSnS4 nanorods over the entire composition range by a facile solution based method and observed a systematic increase of the nanorod aspect ratio with increasing cadmium concentration. On the other hand, the optical band gap of Cu2CdxZn1âxSnS4 nanorods decreases linearly from 1.56 eV (x = 0) to 1.39 eV (x = 1). Smooth, uniform and dense nanorod thin films have been coated on Mo-coated glass substrates using nanorod dispersions as nano-inks by a spray deposition method. Current (I)âVoltage (V) measurements of the annealed films show the highest photoresponse for Cu2Cd0.75Zn0.25SnS4 composition. We further demonstrate that the dipoleâdipole interaction between the solvent and the nanorods can be manipulated for long-range vertical self-assembly of the nanorods for the different compositions. This simple method is promising for large area coating of the absorber layer in thin film solar cells and can be extended for use with other technologically important materials.