两个含双(3,5－二甲吡唑基)甲烷配体的铅(II)配合物的合成与结构表征

Reactions of lead（Ⅱ） nitrate or perchlorate with bis（3,5-dimethylpyrazolyl）methane （dmpzm）, produced two new Pb（Ⅱ） chelated complexes [Pb（dmpzm）2X2] （X=NO3^- 1, ClO4^- 2）. Both compounds were structurally characterized by elemental analysis, IR spectroscopy, thermal analysis, and single crystal X-ray diffraction. Both compounds are mononuclear with a distorted square antiprismatic PbN4O4 coordination geometry incorporating a pair of O,O＇-bidentate anions and N,N＇-bidentate dmpzm ligands. In the crystals of 1 or 2, the methyl or methylene groups of dmpzm ligand interact with the oxygen atoms of nitrates or perchlorates to afford intra- and intermolecular hydrogen bonding, thereby forming a two-dimensional network 1 or a three-dimensional structure 2.     

新颖五核Mo/Cu/S簇合物[MoOS3Cu4(α-MePy)6Br2]的合成及晶体结构

杂核金属含硫簇合物具有丰富的结构,在生物化学、催化和非线性光学等方面显示了诱人的应用前景.近年来,我们主要从事用[MS4 ]2 - 和[Cp* MS3]- ( M=Mo,W)和Cu( ) ,Ag( )反应合成Mo( W) /Cu( Ag) /S簇合物并研究其非线性光学性质[1,2 ] .鉴于用硫代金属酸盐作前驱体合成M- Cu- Ag- S杂三核金属簇合物的工作鲜有报道[3] ,我们尝试用( NH4 ) 2 Mo OS3和Cu Br,Ag Br在α- Me Py中反应,希望得到Mo- Cu- Ag- S杂三核金属簇合物.但上述反应却形成了1个仅含Mo和Cu( )的五核簇合物[Mo OS3Cu4 (α- Me Py) 6 Br2 ],其所含的Mo S3…     

用动态粘弹函数关系表征PMMA/α-MSAN共混物的相分离

测定了聚甲基丙烯酸甲酯／聚（α－甲基苯乙烯丙烯腈）共混物熔体的动态粘弹性．考察动态储能模量Ｇ′与动态损耗模量Ｇ″的关系，发现在终端区域两种聚合物的ｌｇＧ′～ｌｇＧ″关系曲线与温度无关，其外推直线斜率接近２；而其共混物的斜率明显小于２，并随组成变化呈现温度依赖性，由此得到的“临界温度”可用于表征这种具有ＬＣＳＴ行为的共混物的相容性．     

Structure of Copper（Ⅱ）Bis（piperidyldithiocarbamate）

ＳｔｒｕｃｔｕｒｅｏｆＣｏｐｐｅｒ（Ⅱ）Ｂｉｓ（ｐｉｐｅｒｉｄｙｌｄｉｔｈｉｏｃａｒｂａｍａｔｅ）ＬａｎｇＪｉａｎ－ｐｉｎｇ；ＬｕＪｉａｎ－Ｍｅｉ；ＢｉａｎＧｕｏ－Ｑｉｎｇ（ＤｅｐａｒｔｍｅｎｔｏｆＣｈｅｍｉｓｔｒｙ，ＳｕｚｈｏｕＵｎｉｖｅｒｓｉｔｙ...     

成都市城市绿地土壤理化性质研究

对成都市绿地土壤的理化性质进行了研究,并与郊区的土壤作了比较.结果显示,该市绿地土壤的pH明显高于市郊,而有机质含量和总硫含量则低于市郊.     

卤离子导向合成配位聚合物[Hg2X4（ppt）]n（X=I和Br;ppt=1-（4-吡啶基）-吡啶铵-4-硫醇盐）及不同的一维链状结构和三阶非线性光学响应

通过HgX2(X=I,Br)与4,4’-二吡啶基二硫化物(dpds)在乙腈中的溶剂热反应,得到二个含1-(4-吡啶基)-吡啶铵-4-硫醇盐(ppt)的一维配位聚合物:[Hg2I4(ppt)]n(1)和[Hg2Br4(ppt)]n(2).在化合物1和2结构中ppt配体是由dpds在溶剂热反应条件下通过dpds的S—S键和S—C键切断然后进行重排在原位形成的.化合物1具有非中心对称的一维Z字型链状结构,化合物2则具有中心对称的一维Z字型链状结构.用飞秒简并四波混频法测定了1和2溶液的三阶非线性光学性质,化合物1具有较强的非线性光学响应,而化合物2却没有非线性光学响应,这种性质的差异可能由于碘离子是较溴离子更好的电子授体,化合物1有较小的HOMO-LUMO能级,更易发生电子在体系间跃迁,更有效使用三线激发态吸收.     

Mo(W)-Cu(Ag)-S原子簇化合物的研究现状

本文在研究Ｍｏ（Ｗ）－Ｃｕ（Ａｇ）－Ｓ原子簇化合物的低热固态合成化学基础上，详细地对该类簇合物进行了归纳，从中提出；１，ＭＯ４－ｎＳｎ＾２＾－（Ｍ＝Ｍｏ，Ｗ；ｎ＝２，３，４）作为配体中心。２，氧原子在簇合物中仅作为端基，不参与同其他金属成键。３，单个ＭＳ４（Ｍ＝Ｍｏ，Ｗ）基团最多只能键合六个Ｃｕ（Ａｇ）原子，即最大核数为七。４，迄今为止所有Ｍｏ（Ｗ）－Ｃｕ－Ｓ原子簇化合物中Ｃｕ均为＋１价。５，预计     

Synthesis and Structural Characterization of [Cu(DMF)_6][(η~5-C_5Me_5)WS_3(CuBr)_3]_2·Et_2O

1 INTRODUCTION In the last decade, we have been interested in the synthesis of [PPh4][(h5-C5Me5)MS3] (M = Mo, W)[1, 2] , Whose organometallic trisulfido anions show high reactivity towards various transition metals[3~6] . We once reported that the reaction of [PPh4][(h5-C5Me5)WS3] with CuBr in CH3CN afforded a double incomplete-cubane cluster [PPh4]2[(h5-C5Me5)WS3(CuBr)3]2[3], while the analogous reaction of [PPh4][(h5-C5Me5)WS3] with CuBr in CHCl3 gave rise to a 揻our-…     

Synthesis and Structural Characterization of [(η~5-C_5Me_5)_2Mo_2Fe_2S_4Br_2]

1 INTRODUCTION We once reported a CS bond cleavage reaction of (h5-C5Me5)Mo(StBu)3, which led to a Mo(IV) thio/thiolate complex (h5-C5Me5)MoS2(StBu)[1]. This reaction was facilitated by oxidants such as S8, gray selenium, and FeCl3[2]. The reaction with FeCl3 gave rise to a cubane cluster [(h5-C5Me5)2Mo2Fe2S4Cl2], which served as an excellent building block to construct various Mo/Fe/S clusters[2]. In this paper, we report the crystal structure of [(h5-C5Me5)2Mo2Fe…     

Non-Isothermal Kinetics of the Decomposition Reaction of Cluster [Ag3WS3Br]（PPh3）3 and [Cu3WS3Br]（PPh3）3

The thermal behaviors of clusters [Ag3WS3Br](PPh3)3 and [Cu3WS3Br](PPh3)3 (PPh3=triphenyl phosphine) in a nitrogen atmosphere were studied under the non-isothermal conditions by simultaneous TG-DTG-DSC and EDS techniques. The results showed that the evolution of PPh3 generally proceeded before the release of the other moiety in one or two step-mode. The mechanisms, the kinetic and the thermodynamic parameters for decomposition of PPh3 of both clusters were determined and calculated by jointly using several methods, which showed that its evolution was controlled by Avrami-Erofeev equation. The results also showed that there was no new stable phase composed of W-Ag(Cu)-S-Br after release of organic moiety PPh3 and that CVD method was not applicable to their further processing.