羰基四(对磺酸基苯基)卟啉钌(Ⅱ)的合成及光解水产氢的研究

金属卟啉在绿色植物的光合作用中起着重要的电子传递功能,在光解水产氢的研究中被用做光敏剂.在筛选金属卟啉光敏剂的研究中,通过改变卟啉环上的取代基和中心离子,将能改善其光敏性能.Okura等曾研究以羰基四苯基卟啉钌[Ru(CO)TPP]为光敏剂的光解水产氢体系,但由于Ru(CO)TPP不溶于水,故采用表面活性剂将其分散在水中,进行光敏效应的研究.我们合成了一种水溶性的钌卟啉化合物Ru(CO)TPPS,通过电子吸收光谱、红外光谱、核磁共振谱及元素分析等确定结构,并对Ru(CO)TPPS-K_2PtCl_6-TiCl_3复合光解水产氢体系进行了研究.实验结果表明,该体系的酸性水溶液在光照条件下,有较好的释氢性能和较高的转化数.     

烃基取代茚基钌羰基化合物的合成及晶体结构(英文)

配体C9H7R(R=CH2CH2CH3(1),CH(CH3)2(2),C5H9(3),CH2C6H5(4),CH2CH=CH2(5))分别与Ru3(CO)12在二甲苯或庚烷中加热回流,得到了6个双核配合物[(η5-C9H6R)Ru(CO)(μ-CO)]2(R=CH2CH2CH3(6),CH(CH3)2(7),C5H9(8),CH2C6H5(9),CH2CH=CH2(10))和[(η5-C9H6)(H3CH2C)CHCH(CH2CH3)(η5-C9H6)][Ru(CO)(μ-CO)]2(11)。通过元素分析、红外光谱、核磁共振氢谱对配合物的结构进行了表征,并用X-射线单晶衍射法测定了配合物6,9,10和11的结构。     

含C16长碳链1，2－邻二萘醌－2－肟钌（Ⅱ）配合物的合成

通过三种构型的1，2－邻二萘醌－2－肟（2－nqo)钌（Ⅱ）羰基配合物trans, cis－（Ru(2-nqo)2(CO)2](1){(trans-NO,cis-O},cis-,trans-[Ru(2-nqo)2(CO)2] (2){cis-NO,trans-O}及cis,-cis-[Ru(2-nqo)2(CO)2](3){(cis-NO,cis-O)}的去羰 基取代反应，合成了含C16长碳链2-nqo钌（Ⅱ）配合物trans-,cis-[Ru(2-nqo)2 (CO)(spy)](4),cis-,trans-(Ru(2-nqo)2(CO)(spy)(5),cis-,cis-[Ru(2-nqo)2 (CO)(spy)](6)及trans-,trans-(Ru(2-nqo)2(spy)2](7){(trans-NO,trans-O)}。 对其进行了红外、紫外－可见质谱及核磁人振测试，并利用^1H-^1H偶合二维核磁 技术对核磁共振峰进行了指认。     

金属卟啉/异烟酸/二氧化钛复合光催化剂制备及其光催化性能研究

合成了四苯基卟啉(H2TPP)及铜卟啉(CuTPP)和锌卟啉(ZnTPP),获得了配合物[Zn(TPP)(DMF)]的晶体。制备了金属卟啉、异烟酸共修饰的二氧化钛复合光催化剂:金属卟啉/异烟酸/二氧化钛,红外光谱和X-射线衍射(XRD)分析结果表明金属卟啉和异烟酸负载于TiO2表面,未改变TiO2的晶型。在光催化降解水中污染物4-硝基苯酚(4-NP)时显示了好的催化效果。     

混合金属钴钌原子簇Co3Ru(CO)11(NO)2, (RC≡CR^1)Co3Ru(CO)9(NO)的合成与表征

本文报道Co-Ru簇的合成与表征的研究。由Et4N[RuCl4(CH3CN)2]和Co2(CO)8制备了Et4N[Co3Ru(CO)12]·1/3THF, 它与等摩尔的NOBF4反应得到Co3Ru(CO)11(NO)(1)和Co2Ru(CO)11(5)。簇合物1分别与乙炔、苯基乙炔和二苯基乙炔进一步反应得到(HC≡CH)Co3Ru(CO)9(NO)(2), (PhC≡CH)Co3Ru(CO)9(NO)(3)和(PhC≡CPh)Co3Ru(CO)9(NO)(4)。在上述反应中还分离得到(HC≡CH)Co2Ru(CO)9(6), (PhC≡CH)Co2Ru(CO)9(7)和(PhC≡CPh)Co2Ru(CO)9(8)。对所得族合物1,2,3,4进行了IR, UV,^1H NMR, m.p., 元素分析和单晶X射线衍射分析等性质表征, 簇合物3的晶体属单斜晶系, pα1/n空间群, 晶胞参数为: a=1.1438(9), b=.3033(6), c=1.4345(9)nm, β=100.72(4)°, 每个晶胞中有四个分子。     

混合金属钴钌原子簇Co3Ru(CO)11(NO)2, (RC≡CR^1)Co3Ru(CO)9(NO)的合成与表征

本文报道Co-Ru簇的合成与表征的研究。由Et4N[RuCl4(CH3CN)2]和Co2(CO)8制备了Et4N[Co3Ru(CO)12]·1/3THF, 它与等摩尔的NOBF4反应得到Co3Ru(CO)11(NO)(1)和Co2Ru(CO)11(5)。簇合物1分别与乙炔、苯基乙炔和二苯基乙炔进一步反应得到(HC≡CH)Co3Ru(CO)9(NO)(2), (PhC≡CH)Co3Ru(CO)9(NO)(3)和(PhC≡CPh)Co3Ru(CO)9(NO)(4)。在上述反应中还分离得到(HC≡CH)Co2Ru(CO)9(6), (PhC≡CH)Co2Ru(CO)9(7)和(PhC≡CPh)Co2Ru(CO)9(8)。对所得族合物1,2,3,4进行了IR, UV,^1H NMR, m.p., 元素分析和单晶X射线衍射分析等性质表征, 簇合物3的晶体属单斜晶系, pα1/n空间群, 晶胞参数为: a=1.1438(9), b=.3033(6), c=1.4345(9)nm, β=100.72(4)°, 每个晶胞中有四个分子。     

混合金属钴钌原子簇Co_3Ru(CO)_(11)(NO),(RC≡CR~1)Co_3Ru(CO)_9(NO)的合成与表征

本文报道Co-Ru簇的合成与表征的研究.由Et_4N[RuCl_4(CH_3CN)_2]和Co_2(CO)_8制备了Et_4N[Co_3Ru(CO)_(12)]·1/3THF,它与等摩尔的NOBF_4反应得到Co_3Ru(CO)_(11)(NO)(1)和Co_2Ru(CO)_(11)(5).簇合物1分别与乙炔、苯基乙炔和二苯基乙炔进一步反应得到(HC≡CH)Co_3Ru(CO)_9(NO)(2),(PhC≡CH)Co_3Ru(CO)_9(NO)(3)和(PhC≡CPh)Co_3Ru(CO)_9(NO)(4).在上述反应中还分离得到(HC≡CH)Co_2Ru(CO)_96),(PhC≡CH)Co_2Ru(CO)_9(7)和(PhC≡CPh)Co_2Ru(CO)_9(8).对所得族合物1,2,3,4进行了IR,UV,~1H NMR,m.p.,元素分析和单晶X射线衍射分析等性质表征.簇合物3的晶体属单斜晶系,Pa_1/n空间群,晶胞参数为:a=1.1438(9),b=1.3033(6),c=1.4345(9)nm.β=100.72(4)°.每个晶胞中有四个分子.     

新型膦胺配体羰基钌化合物的合成及其催化性能研究

以十二羰基三钌和o-PPh2C6H4NR2(R=H,Me)配体为原料,成功制备了三种新型羰基钌化合物(μ-o-PPh2-C6H4NH)Ru3(μ-H)(CO)9(2)、(o-PPh2C6H4NH)2Ru(CO)2(3)和(μ-o-PPh2C6H4NMe2)2Ru(CO)3(4).对这三个化合物进行了核磁共振和红外谱学、元素分析和X射线单晶衍射分析表征,并对这三个化合物进行了催化性能研究.化合物2和4可催化苯甲醛加氢反应生成苯甲醇,但是3没有催化活性.从实验角度阐述了膦胺配体钌催化剂的结构与性能关联,进一步探讨了加氢催化反应失活的可能原因.     

双脂肪胺钌卟啉的合成、结构表征和晶体结构

本文讨论了一系列双脂肪胺钌卟啉配合物，包括Ru(^Ⅱ)(Por)(H₂NR)₂和Ru(^Ⅱ)(Por)(HNR₂)₂［Por=四苯基卟啉(TPP)，中位-四(对甲苯基)卟啉(TTP)，中位-四(对氯苯基)卟啉(4-Cl-TPP);R=叔丁基，异丙基，环己基，正辛基，正十二烷基，R′=甲基和乙基］的合成，结构表征和晶体结构测定。钌羰基卟啉与间-氯过苯甲酸的反应混合物用过量的脂肪胺处     

对位取代四苯基卟啉及其铁(Ⅲ)配合物的~1H NMR研究

本文用BRUKER MSL-400型超导核磁共振仪,对于对位取代四苯基卟啉[H_2(p-X)TPP,X=Cl,H,CH_3,OCH_3],对位取代四苯基卟啉铁(Fe(Ⅲ)(p-X)TPPCl)及其轴向配合物([Fe(Ⅲ)(p-X)TPP(HIm)_2]~+Cl~-,([Fe(Ⅲ)(p-CH_3)TPPYm]~+Cl~-,Y=2-CH_3Im,2-C_2H_5-4-CH_3Im,n-C_3H_7NH_2,N(C_2H_5)_3)的质子核磁共振谱进行了较系统的研究,探讨了分子对称性、电子结构、顺磁效应等对~1H NMR谱的影响以及铁卟啉配合物的电子自旋离域机理。     

二氧化碳和丙烯直接合成甲基丙烯酸的NiPMo/TiO2催化剂的研究

用溶胶-凝胶法以磷钼酸(MPA)的镍盐溶液水解钛酸四丁酯制备了NiPMo/TiO2催化剂.使用ICP、 XRD、 TG-DTA、 IR、 TPD-MS和微反应技术研究了催化剂的化学组成、热稳定性、化学吸附性质和催化反应性能.杂多钼酸盐与TiO2通过O2-在TiO2表面发生了键合.在623 K下,杂多阴离子仍保持原有的Keggin结构.CO2在Lewis酸位Ni(Ⅱ)和Lewis碱位Ni-O-Mo的桥氧协同作用下生成CO2卧式吸附态Ni(Ⅱ)←O-(CO)←(O--Ni).丙烯有多种吸附态在催化剂上吸附.在563 K、 1 MPa和空速1500 h-1的反应条件下,丙烯的摩尔转化率为3.2%,产物MAA选择性为95%.     

CoFe2O4自形成磁性液体场致结构化对磁化的影响

The Langevin paramagnetic theory can’t describe the relation between magnetization of ferrofluids and applied magnetic field. The structuralization of ferrofluids, which is considered the main influence factor of the magnetization, is regarded. The part of magnetization works is deposited when the structure is forming. This action influences the magnetization of ferrofluids directly or indirectly. On the base of the “compressing” model, the Langevin function that usually describes the magnetization of ferrofluid is modified, and a well-fitted curve is obtained. An equation of the relation between the equivalent volume fraction after being “compressed” and the intensity of magnetic field is discovered, which approximately describes the process of magnetization. The relation between the approximate initial susceptibility and the volume fraction can be obtained from modified formula.     

Highly regioselective Buchwald–Hartwig amination at C-2 of 2,4-dichloropyridine enabling a novel approach to 2,4-bisanilinopyridine (BAPyd) libraries

The highly regioselective Buchwald–Hartwig amination at C-2 of the cheap and readily accessible reagent, 2,4-dichloropyridine with a range of anilines and heterocyclic amines is described. This new methodology is robust and provides a facile access to 4-chloro-N-phenylpyridin-2-amines on 0.25 mol scale. These intermediates undergo a further Buchwald–Hartwig amination at higher temperature to enable rapid exploration of the chemical space at C-4 and to provide a library of 2,4-bisaminopyridines.     

Sulfur-directed metal-free and regiospecific methyl C(sp3)–H imidation of thioanisoles

Regiospecific and direct imidation of the methyl C(sp³)–H bond of thioanisoles is realized under mild and metal-free conditions with N-fluorobis(benzenesulfonyl)imide as an oxidant and nitrogen source. Proposed mechanism suggests that thionium ion intermediates and a Pummerer-type reaction are involved. The imidation has advantages such as high step-economy, excellent functionality tolerance, and regiospecificity, giving structurally diverse imidation products.     

Selective syntheses of 2H-1,3-oxazines and 1H-pyrrol-3(2H)-ones via temperature-dependent Rh(II)-carbenoid-mediated 2H-azirine-ring expansion

The Rh(II)-catalyzed reaction of 2-carbonyl-substituted 2H-azirines with ethyl 2-cyano-2-diazoacetate or 2-diazo-3,3,3-trifluoropropionate provides an easy access to 2H-1,3-oxazines and 1H-pyrrol-3(2H)-ones. These compounds can be selectively prepared from the same starting material using temperature as the only varied parameter. The 2-azabuta-1,3-diene intermediate, a common precursor for both heterocyclic products, isomerizes into 2H-1,3-oxazine under kinetic control, while 1H-pyrrol-3(2H)-one is the sole product of the reaction at elevated temperatures. According to DFT-calculations a one-atom oxazine ring contraction involving ring-opening to a 2-azabuta-1,3-diene intermediate, followed by a 1,5- and 1,2-prototropic shift leads to the consecutive formation of imidoylketene and azomethine ylide, which then further undergo cyclization to the pyrrole derivative.     

Copper catalyzed/mediated synthetic methodology for ebselen and related isoselenazolones

Scope of the copper catalyzed/mediated selenium-nitrogen coupling reaction has been studied for the synthesis of isoselenazolones. It is noticed that the 2-chloro, 2-bromo-, and 2-iodo-aryl amides substrates can be exploited in the selenium-nitrogen coupling reaction by employing 25-100 mol % of CuI/1,10-phenanthroline (L) and potassium carbonate as a base in DMF. Furthermore, electron rich 2-chloro-arylamides also underwent selenium-nitrogen coupling reaction to give biologically important selenium-nitrogen heterocycles. Also, copper-catalyzed selenium-nitrogen coupling reaction has been meticulously applied for the synthesis of diaryl diselenides having methoxy, amine, and amide functionality from respective aryl iodides in the presence of stoichiometric amount of succinimide as an external Se-N coupling partner.     

Knoevenagel condensation catalyzed by novel Nmm-based ionic liquids in water

A series of novel N-methyl morpholine (Nmm) based ionic liquids with 1,2-propanediol group were synthesized and used as catalysts for Knoevenagel condensation at room temperature in water. Under the effect of the catalyst, various aldehydes or aliphatic ketones could react with a wide range of activated methylene compounds well, including malononitrile, alkyl cyanoacetate, cyanoacetamide, β-diketone, barbituric acid, 2-arylacetonitrile and thiazolidinedione. Furthermore, most of the products could be separated just by filtrating and washing with water. Additionally, the catalyst is recyclable and applicable for the large-scale synthesis.     

Construction of polyheterocyclic spirotetrahydrothiophene derivatives via sulfa-Michael/aldol cascade reaction

A series of polyheterocyclic spirotetrahydrothiophene derivatives were obtained in moderate to excellent yields via a catalyst-free sulfa-Michael/aldol cascade reaction of chalcones 1 and commercially available 1,4-dithiane-2,5-diol 2 under mild conditions. We also present the first asymmetric sulfa-Michael/aldol cascade reaction of chalcones 1 and commercially available 1,4-dithiane-2,5-diol 2 with moderate to good enantioselectivities catalyzed by readily available chiral phase-transfer catalysts (PTCs).     

Suzuki-Miyaura reactions of the soluble guanylate cyclase inhibitor NS2028: a non-product specific route to C-8 substituted analogues

Both soluble guanylate cyclase (sGC) inhibitors ODQ 1 and NS2028 2 are synthesized via improved protocols. In the former case treating 3,4-dihydroquinoxalin-2(1H)-one oxime 8, which can be prepared in two steps from 1,2-benzenediamine, with 1,1′-carbonyldiimidazole (CDI) gives the dihydro-ODQ 10 that in the presence of KMnO₄ oxidises to give ODQ 1 in an overall yield of 46% starting from 1,2-benzenediamine. In the latter case, the synthesis affords NS2028 2 from 2-amino-4-bromophenol 3 in three steps with an overall yield of 85% and avoids the need for chromatography. Furthermore, Suzuki-Miyaura reaction conditions are described that enable the preparation of 8-aryl and 8-heteroaryl derivatives of NS2028 directly from NS2028 2. Finally, demethylation of the 8-(methoxyphenyl) substituted analogues afforded the 8-(hydroxyphenyl) derivatives 40-42. All new products are fully characterised.