1384522-77-3Relevant academic research and scientific papers
Coligand modulated oxidative: O -demethylation of a methyl ether appended tetradentate N-ligand in Co(ii) complexes
Anjana, S. S.,Murthy, Narasimha N.,Varghese, B.
, p. 3187 - 3197 (2020)
Two Co(ii) complexes of the formula CoLOMeX2 (X = Cl- (1a); X = I- (1b)), where LOMe is 2-methoxy-N,N-bis(pyridin-2-ylmethyl) aniline, were synthesized and their structure, spectra and reactivity were studied. Upon oxidation of 1a and 1b, the ligand LOMe undergoes demethylation at the metal centre resulting in the formation of Co(iii) complexes with modified phenoxide ligands. This is the very first example of oxidative O-demethylation reported at a Co(ii) centre. The oxidative behaviour exhibits a striking dependence on the nature of coligands coordinated to the metal centre. The Co(ii) complex 1a with stronger chloro coligands requires a strong oxidising agent like t-BuOOH for oxidative demethylation and the subsequent formation of a mononuclear Co(iii) complex with a demethylated ligand, CoLO-Cl2 (2). On the other hand, complex 1b with weaker iodo coligands undergoes oxidation in the presence of the weak oxidant O2 to form a dihydroxo bridged binuclear Co(iii) complex [Co2(LO-)2(OH)2]2+ (3) with modified phenoxide ligands. The oxidation of 1b to 3 is monitored and the intermediate Co(ii) iodo aqua complex [CoLOMeI(H2O)]+ and Co(ii) diaqua complex [CoLOMe(H2O)2]2+ are isolated and characterised.
A for detecting the water environment metal ion content of organic compounds and application (by machine translation)
-
Paragraph 0025; 0043; 0046; 0047, (2018/09/11)
The invention discloses a method for metal ion content detection of organic compound, said compound N, N - methyl pyridine aniline as metal ion hydrophilicity, in its molecule is introduced into the chromophore group or a fluorescent group, producing the metal cadmium ion and zinc ion in particular of color indicator or fluorescent indicator. The compounds of this invention can also be fixed in the hydrophilic high polymer, the use of chromogenic group or a fluorescent group can be made into a multi-time characteristic of the use of reversible metal ion fluorescent probe, can be suitable for various environment in the continuous detection of the concentration of the metal ions, in particular in the water environment to the cadmium ion and zinc ion concentration of continuous measurement. (by machine translation)
Quantifying factors that influence metal ion release in photocaged complexes using ZinCast derivatives
Gwizdala, Celina,Singh, Charlene V.,Friss, Tracey R.,MacDonald, John C.,Burdette, Shawn C.
experimental part, p. 8162 - 8174 (2012/08/08)
Two generations of nitrobenzhydrol-based photocages for Zn2+ have been prepared and characterized. The first series includes the tridentate ZinCast-1 utilizes a bis-pyridin-2-ylmethyl-aniline ligand that forms a 5,5-chelate ring upon metal binding. The related photocages ZinCast-2 with a N-[2-(pyridine-2-yl)ethyl]-N-(pyridine-2-ylmethyl)aniline (5,6-chelate ring) and ZinCast-3 with a N,N-bis[2-(pyridine-2-yl)ethyl]aniline (6,6-chelate ring) were synthesized for comparative studies. The complexes formed by the ions Cu 2+, Zn2+ and Cd2+ with three ZinCast and their photoproducts (ZinUnc) were interrogated by UV-Vis spectroscopy. The studies indicate that ZinCast-1 forms complexes of the highest stability and ZinCast-3 exhibits the most significant changes in metal affinity upon uncaging. These results suggest that the changes in nitrogen atom donor ability as well as the initial complex stability must be considered to design a photocage with the desired properties. The composite results were used to design ZinCast-4 and ZinCast-5, the second generation photocages that incorporate an additional adjacent ether ligand into the Zn2+ chelator.
