Fluoro-functionalized polymeric N-heterocyclic carbene-zinc complexes: efficient catalyst for formylation and methylation of amines with CO2 as a C1-building block

RSC Advances ◽  
2015 ◽  
Vol 5 (25) ◽  
pp. 19613-19619 ◽  
Author(s):  
Zhen-Zhen Yang ◽  
Bo Yu ◽  
Hongye Zhang ◽  
Yanfei Zhao ◽  
Guipeng Ji ◽  
...  
Keyword(s):  
Building Block ◽  
Zinc Complex ◽  
Zinc Complexes ◽  
Efficient Catalyst

A heterogeneous fluoro-functionalized polymeric N-heterocyclic carbene-zinc complex (F-PNHC-Zn) was designed and prepared for the formylation and methylation of N-methylanilines using CO2 as a C1 building block in the presence of organosilane.

A new air-stable zinc complex based on a 1,2-phenylene-diimino-2-cyanoacrylate ligand as an efficient catalyst of the epoxide–CO2coupling

2014 ◽  
Vol 43 (6) ◽  
pp. 2344-2347 ◽  
Author(s):  
M. A. Fuchs ◽  
S. Staudt ◽  
C. Altesleben ◽  
O. Walter ◽  
T. A. Zevaco ◽  
...  
Keyword(s):  
Zinc Complex ◽  
Efficient Catalyst

Preparation and Characteristics of Novelty Chitosan Schiff Base and its Zinc Complexes

2011 ◽  
Vol 239-242 ◽  
pp. 1364-1367 ◽  
Author(s):  
Xue Wen Wu ◽  
Yan Xiong
Keyword(s):  
Schiff Base ◽  
Elemental Analysis ◽  
Water Loss ◽  
Zinc Complex ◽  
Physicochemical Characteristics ◽  
Zinc Complexes ◽  
Thermal Behaviors ◽  
Ft Ir ◽  
And Performance ◽  
Chitosan Schiff Base

In this paper, a new kind of chitosan schiff base and its zinc complexes were prepared. Chitosan schiff base (CS-DBSB) was obtained when 3, 5-Di-tert-butyl salicylaldehyde was introduced to the C-2 nitrogen position of chitosan. Its zinc complex of CS-DBSB (CS-DBSB-Zn) was also prepared. The structure and performance of physicochemical characteristics of CS-DBSB and CS-DBSB-Zn were examined by FT-IR, elemental analysis, thermogravimetric (TG). The thermal behaviors of CS-DBSB and CS-DBSB-Zn were described. TG curves presented three events including water loss, decomposition of the polysaccharide generating a carbonaceous residue that burns at higher temperatures.

Far-red absorbing azodipyrrin dyes — Synthesis, X-ray crystallographic, and spectral characterization of 1,9-diazodipyrrins and their metal complexes

2011 ◽  
Vol 89 (4) ◽  
pp. 481-487 ◽  
Author(s):  
Yan Li ◽  
David Dolphin
Keyword(s):  
Metal Complexes ◽  
Zinc Complex ◽  
Nickel Complexes ◽  
Crystallographic Analysis ◽  
Zinc Complexes ◽  
Spectral Characterization ◽  
X Ray ◽  
Almost All ◽  
C Nmr

A series of novel 1,9-diazodipyrrins (4) were readily synthesized by reacting aryldiazonium salts with 5-aryldipyrromethanes under both acidic and basic conditions. The zinc complex of 1,9-diphenylazodipyrrin (5aZn) was confirmed by X-ray crystallographic analysis, and 1,9-diazodipyrrins and their zinc and nickel complexes (5M) were characterized by 1H and 13C NMR, IR, UV–vis, and MS. All of the metal complexes absorb almost all colours of the rainbow; the absorption maximums are >650 nm and the half-band widths are over 100 nm. The fluorescence of the zinc complexes of 1,9-diphenylazodipyrrin (5aZn) and 1,9-di(2-iodophenylazo)dipyrrin (5cZn) were also explored.

Synthesis of dipyrrin-containing architectures

2005 ◽  
Vol 09 (11) ◽  
pp. 745-759 ◽  
Author(s):  
Kannan Muthukumaran ◽  
Syeda Huma H. Zaidi ◽  
Lianhe Yu ◽  
Patchanita Thamyongkit ◽  
Matthew E. Calder ◽  
...  
Keyword(s):  
Supramolecular Chemistry ◽  
Phosphonic Acid ◽  
Building Block ◽  
Room Temperature ◽  
Light Harvesting ◽  
Zinc Complexes ◽  
Trans Configuration ◽  
Zinc Porphyrins ◽  
Self Assembled ◽  
Acid Unit

Dipyrrins are valuable precursors to dyes [dipyrrinatoboron difluoride, bis(dipyrrinato)-zinc(II) complexes] and serve as ligands in a variety of self-assembled materials. Six new dipyrrin-containing architectures have been synthesized. The architectures include bis(dipyrrinato) complexes containing copper(II) or palladium(II), a dipyrrin bearing a protected phosphonic acid unit, a porphyrin bearing two dipyrrins in a trans configuration, a linear diphenylethyne-linked dipyrromethane-dipyrrin building block, and a triad composed of two zinc porphyrins joined via an intervening bis(dipyrrinato)copper(II) complex. Two porphodimethenatozinc complexes were prepared and found to have Φ f ≤ 0.002 (in toluene at room temperature), which is substantially less than the analogous bis(dipyrrinato)zinc complexes. Taken together, the syntheses described herein should broaden access to dipyrrins for use as complexation motifs in supramolecular chemistry and as pigments in light-harvesting applications.

Designing ancillary ligands for heteroleptic/homoleptic zinc complex formation: synthesis, structures and application in ROP of lactides

2015 ◽  
Vol 44 (30) ◽  
pp. 13700-13715 ◽  
Author(s):  
D. Jędrzkiewicz ◽  
J. Ejfler ◽  
N. Gulia ◽  
Ł. John ◽  
S. Szafert
Keyword(s):  
Complex Formation ◽  
Zinc Complex ◽  
Zinc Complexes ◽  
Synthesis And Characterization ◽  
Ancillary Ligands ◽  
Amino Phenol

Synthesis and characterization of a series of new amino-phenol/naphthol ligands (L1,2-H) have been developed and their respective zinc complexes (1 and 2-Zn) have been synthesized.

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