Dynamic imine chemistry in metal–organic polyhedra

RSC Advances ◽  
2015 ◽  
Vol 5 (82) ◽  
pp. 67011-67030 ◽  
Author(s):  
Harsh Vardhan ◽  
Akshay Mehta ◽  
Ipsita Nath ◽  
Francis Verpoort
Keyword(s):  
Schiff Base ◽  
Schiff Base Ligands ◽  
Metal Organic ◽  
Self Assembled

This review highlights the intercession of Schiff base ligands in the preparation of self-assembled architectures mainly metal–organic polyhedra and describes their unprecedented role in various key applications.

Self-assembled half-sandwich polyhedral cages via flexible Schiff-base ligands: an unusual macrocycle-to-cage conversion

2016 ◽  
Vol 45 (35) ◽  
pp. 13675-13679 ◽  
Author(s):  
Jing-Jing Liu ◽  
Yue-Jian Lin ◽  
Zhen-Hua Li ◽  
Guo-Xin Jin
Keyword(s):  
Schiff Base ◽  
Schiff Base Ligands ◽  
Self Assembled ◽  
Half Sandwich

Half-sandwich M6(L1)4 octahedral and M8(L2)4 cubic cages have been assembled by flexible Schiff-base ligands upon coordination to Cp*Rh(iii) organometallic acceptors. In particular, the Rh(iii)-based half-sandwich M2(HL1)2 macrocycle rearranges in solution to give a M6(L1)4 cage.

scholarly journals Unprecedented Water Effect as a Key Element in Salicyl-Glycine Schiff Base Synthesis

Molecules ◽  
2020 ◽  
Vol 25 (5) ◽  
pp. 1257 ◽  
Author(s):  
Karolina Bakalorz ◽  
Łukasz Przypis ◽  
Mateusz Michał Tomczyk ◽  
Maria Książek ◽  
Ryszard Grzesik ◽  
...  
Keyword(s):  
Schiff Base ◽  
Aqueous Media ◽  
Schiff Base Ligands ◽  
Metal Catalysis ◽  
Space Groups ◽  
Monoclinic Form ◽  
Metal Organic ◽  
And Behavior ◽  
Amino Acid Schiff Base

Salens, as chelating, double Schiff base ligands, are an important group utilized in transition metal catalysis. They have been used to build interesting functional metal-organic frameworks (MOFs). However, salens interacting with amino acids have also found applications in receptors. Here, we intended to form a “green” glycine-derived salen fragment, but the available literature data were contradictory. Therefore, we optimized the synthetic conditions and obtained the desired product as two different crystallographic polymorphs (orthorhombic Pcca and monoclinic P21/c space groups). Their structures differ in conformation at the glycine moiety, and the monoclinic form contains additional, disordered water molecules. Despite the high stability of Schiff bases, these newly obtained compounds hydrolyze in aqueous media, the process being accelerated by metal cations. These studies, accompanied by mechanistic considerations and solid-state moisture and thermal analysis, clarify the structure and behavior of this amino acid Schiff base and shed new light on the role of water in its stability.

Self-assembled copper(ii) metallacycles derived from asymmetric Schiff base ligands: efficient hosts for ADP/ATP in phosphate buffer

2015 ◽  
Vol 44 (39) ◽  
pp. 17152-17165 ◽  
Author(s):  
Amit Kumar ◽  
Rampal Pandey ◽  
Ashish Kumar ◽  
Rakesh Kumar Gupta ◽  
Mrigendra Dubey ◽  
...  
Keyword(s):  
Schiff Base ◽  
Schiff Bases ◽  
Phosphate Buffer ◽  
Schiff Base Ligands ◽  
Self Assembled

Tetranuclear supramolecular copper(ii) complexes derived from asymmetric Schiff bases have been synthesized, characterized and demonstrated as size selective hosts for ADP/ATP.

Conductivity Studies of Schiff Base Ligands Derived from O-Phenylenediamine and Their Co(II) and Zn(II) Complexes

2015 ◽  
Vol 12 (2) ◽  
pp. 13
Author(s):  
Muhamad Faridz Osman ◽  
Karimah Kassim
Keyword(s):  
Nuclear Magnetic Resonance ◽  
Fourier Transform ◽  
Schiff Base ◽  
Nmr Spectroscopy ◽  
Magnetic Resonance ◽  
Impedance Spectroscopy ◽  
Ftir Spectroscopy ◽  
Coordination Complexes ◽  
Frequency Range ◽  
Schiff Base Ligands

The coordination complexes of Co(II) and Zn(II) with Schiff bases derived from o-phenylenediamine and substituted 2-hydroxybenzaldehyde were prepared All compounds were characterized by Fourier transform infrared (FTIR) spectroscopy and Nuclear magnetic resonance (NMR) spectroscopy elemental analyzers. They were analyzed using impedance spectroscopy in the frequency range of 100Hz-1 MHz. LI and L2 showed higher conductivity compared to their metal complexes, which had values of 1.3 7 x 10-7 and 6.13 x 10-8 S/cm respectively. 

Tetranuclear Copper and Mononuclear Nickel Complex of the Schiff Base of (3Z)-3-Hydrazonobutan-2-One Oxime with Different Aromatic Carbonyl Compounds: Synthesis, Single Crystal X-Ray Structure, Catecholase Activity, Phenoxazinone Synthase Activity, Catalytic Study for the Homocoupling of Benzyl Amines

2019 ◽  
Author(s):  
Swaraj Sengupta ◽  
Sahanwaj Khan ◽  
Shyamal K. Chattopadhyay ◽  
Indrani Banerjee ◽  
Tarun K. Panda ◽  
...  
Keyword(s):  
Schiff Base ◽  
Single Crystal ◽  
Copper Complex ◽  
Carbonyl Compounds ◽  
Nickel Complex ◽  
Schiff Base Ligands ◽  
X Ray ◽  
Phenoxazinone Synthase ◽  
Catecholase Activity ◽  
Aromatic Carbonyl Compounds

Synthesis and characterisation of one trinuclear copper complex, ([Cu<sub>3</sub>L<sub>3</sub>O]ClO<sub>4</sub>) (<b>1</b>) and one nickel complex ([Ni(L'H)<sub>2</sub>(dmso)<sub>2</sub>](ClO<sub>4</sub>)<sub>2</sub>) (<b>2</b>) with Schiff base ligands: (3Z)-3-((Z)-(1-(thiophen-2-yl)ethylidene)hydrazono)butan-2-one oxime (LH) and 1-(pyridin-2-yl)ethylidene)hydrazono)butan-2-one oxime (L<sup>'</sup>H). <b>1</b> shows high catecholase activity and has also been tested as a catalyst for the synthesis of benzylimine. <b>2 </b> shows phenoxazinone synthase activity.

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