Synthesis of Dinuclear Complexes Bearing Metalloporphyrin−Phosphine Hybrid Ligands and Their Catalytic Activity toward Hydrosilylation of Ketones

2004 ◽  
Vol 23 (17) ◽  
pp. 4012-4017 ◽  
Author(s):  
Makoto Saito ◽  
Yoshiaki Nishibayashi ◽  
Sakae Uemura
Keyword(s):  
Catalytic Activity ◽  
Dinuclear Complexes ◽  
Hybrid Ligands

scholarly journals Zinc Complexes with Guanidine-Pyridine Hybrid Ligands: Anion Effect and Catalytic Activity

2015 ◽  
Vol 641 (12-13) ◽  
pp. 2147-2156 ◽  
Author(s):  
Artjom Döring ◽  
Ulrich Flörke ◽  
Alexander Hoffmann ◽  
Matthew D. Jones ◽  
Dirk Kuckling ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Zinc Complexes ◽  
Anion Effect ◽  
Hybrid Ligands

scholarly journals Solvent-Dependent Switch of Ligand Donor Ability and Catalytic Activity of Ruthenium(II) Complexes Containing Pyridinylidene Amide (PYA) N-Heterocyclic Carbene Hybrid Ligands

2014 ◽  
Vol 53 (15) ◽  
pp. 8054-8060 ◽  
Author(s):  
Vivienne Leigh ◽  
Daniel J. Carleton ◽  
Juan Olguin ◽  
Helge Mueller-Bunz ◽  
L. James Wright ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Donor Ability ◽  
Hybrid Ligands

Syntheses and structures of two gold(i) coordination compounds derived from P–S hybrid ligands and their efficient catalytic performance in the photodegradation of nitroaromatics in water

2015 ◽  
Vol 44 (12) ◽  
pp. 5662-5671 ◽  
Author(s):  
Hai-Xiao Qi ◽  
Jian-Feng Wang ◽  
Zhi-Gang Ren ◽  
Jin-Jiao Ning ◽  
Jian-Ping Lang
Keyword(s):  
Catalytic Activity ◽  
Coordination Compounds ◽  
Catalytic Performance ◽  
High Catalytic Activity ◽  
Hybrid Ligands

Two Au–P–S complexes [Au2(dppatc)2]Cl2 and [Au(dppmt)]2 were prepared and they showed high catalytic activity toward the photodegradation of nitroaromatics in water.

Zinc Complexes with Guanidine-Pyridine Hybrid Ligands - Guanidine Effect and Catalytic Activity

2011 ◽  
Vol 2011 (28) ◽  
pp. 4441-4456 ◽  
Author(s):  
Janna Börner ◽  
Ines dos Santos Vieira ◽  
Matthew D. Jones ◽  
Artjom Döring ◽  
Dirk Kuckling ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Zinc Complexes ◽  
Hybrid Ligands

Correlation of the hydrogénation catalytic activity of dinuclear complexes of rhodium(I) with the formation of carbonyl-bridged complexes

1982 ◽  
Vol 60 (11) ◽  
pp. 1363-1367 ◽  
Author(s):  
Alan R. Sanger
Keyword(s):  
Catalytic Activity ◽  
Dinuclear Complexes

Methanolic solutions of the dinuclear cationic complexes of rhodium(I), [Rh2(μ-X)(CO)2(Ph2ECH2EPh2)2]+ (X = Cl, Br; E = P, As) and iridium(I), [Ir2Cl(CO)3(Ph2PCH2PPh2)2], are each active catalysts for the hydrogenation of alkynes to alkenes, and alkenes to alkanes. Neutral complexes with pseudohalide ligands have also been investigated but only the cyano-complex [Rh2(CN)2(CO)2(Ph2PCH2PPh2)2], and the arsine analog, are of significant catalytic activity. Only those complexes which reversibly form bridged complexes with ligands such as CO are also catalytically active.Similar complexes with dithioether ligands are not efficient catalysts under the conditions tested.

High resolution electron microscopy of lanthanum phosphate crystals

1978 ◽  
Vol 36 (1) ◽  
pp. 274-275
Author(s):  
J. C. Wheatley ◽  
J. M. Cowley
Keyword(s):  
Electron Microscopy ◽  
Catalytic Activity ◽  
High Resolution ◽  
Petroleum Industry ◽  
High Resolution Electron Microscopy ◽  
Lanthanum Phosphate ◽  
Good Catalyst ◽  
Resolution Electron ◽  
Good Catalytic Activity ◽  
Physical And Chemical

Rare-earth phosphates are of particular interest because of their catalytic properties associated with the hydrolysis of many aromatic chlorides in the petroleum industry. Lanthanum phosphates (LaPO4) which have been doped with small amounts of copper have shown increased catalytic activity (1). However the physical and chemical characteristics of the samples leading to good catalytic activity are not known.Many catalysts are amorphous and thus do not easily lend themselves to methods of investigation which would include electron microscopy. However, the LaPO4, crystals are quite suitable samples for high resolution techniques.The samples used were obtained from William L. Kehl of Gulf Research and Development Company. The electron microscopy was carried out on a JEOL JEM-100B which had been modified for high resolution microscopy (2). Standard high resolution techniques were employed. Three different sample types were observed: 669A-1-5-7 (poor catalyst), H-L-2 (good catalyst) and 27-011 (good catalyst).

The design and catalytic performance of molybdenum active sites on an MCM-41 framework for the aerobic oxidation of 5-hydroxymethylfurfural to 2,5-diformylfuran

2019 ◽  
Vol 9 (3) ◽  
pp. 811-821 ◽  
Author(s):  
Zhao-Meng Wang ◽  
Li-Juan Liu ◽  
Bo Xiang ◽  
Yue Wang ◽  
Ya-Jing Lyu ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Active Sites ◽  
Aerobic Oxidation ◽  
Catalytic Performance ◽  
Mcm 41

The catalytic activity decreases as –(SiO)3Mo(OH)(O) > –(SiO)2Mo(O)2 > –(O)4–MoO.

DV-Xα calculations on some metallacyclopentadienyl dinuclear complexes

1989 ◽  
Vol 86 ◽  
pp. 841-846 ◽  
Author(s):  
Maurizio Casarin ◽  
Gaetano Granozzi
Keyword(s):  
Dinuclear Complexes

Prolonged Expression of Procoagulant Activity of Human Platelets Degranulated by Thrombin

1995 ◽  
Vol 74 (03) ◽  
pp. 958-961 ◽  
Author(s):  
Raelene L Kinlough-Rathbone ◽  
Dennis W Perry
Keyword(s):  
Catalytic Activity ◽  
Thrombus Formation ◽  
Annexin V ◽  
Human Platelets ◽  
Procoagulant Activity ◽  
Prothrombinase Complex ◽  
Arterial Thrombus ◽  
Flowing Blood

SummaryPlatelets are exposed to thrombin when they take part in arterial thrombus formation, and they may return to the circulation when they are freed by fibrinolysis and dislodged by flowing blood. Thrombin causes the expression of procoagulant activity on platelets, and if this activity persists, the recirculating platelets may contribute to subsequent thrombosis. We have developed techniques to degranulate human platelets by treatment with thrombin, and recover them as single, discrete platelets that aggregate in response to both weak and strong agonists. In the present study we examined the duration of procoagulant activity on the surface of thrombin-degranulated platelets by two methods: a prothrombinase assay, and the binding of 125I-labeled annexin. Control platelets generated 0.9 ± 0.4 U thrombin per 107 platelets in 15 min. Suspensions of thrombin-degranulated platelets formed 5.4 ± 0.1 U thrombin per 107 platelets in this time. Binding of 125I-annexin V was also greater with thrombin-treated platelets than with control platelets (controls: 1.7 ±0.1 ng annexin/107 platelets; thrombin-degranulated platelets: 6.8 ± 0.2 ng annexin/107 platelets). With thrombin-degranulated platelets, increased procoagulant activity and annexin binding persisted for at least 4 h after degranulation and resuspension, indicating that the catalytic activity for the prothrombinase complex is not reversed during this time. These platelets maintained their ability to aggregate for 4 h, even in response to the weak agonist, ADP. Thus, platelets that have taken part in thrombus formation and returned to the circulation may contribute to the promotion of further thrombotic events because of the persistence of procoagulant activity on their surface.

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