1163155-76-7

Upstream product

• 2038-03-1 4-(2-AMINOETHYL)MORPHOLINE 
• 7310-95-4 2-Hydroxy-5-methylisophthalaldehyde 
• 3328-69-6 2-hydroxy-isophthalaldehyde 

Relevant academic research and scientific papers

A phenolato-bridged dinuclear Ni(II) complex for selective fluorescent sensing of oxalate in aqueous medium

A newly synthesized and characterized phenolato bridged di-nuclear nickel(II) complex (1) acts as a highly sensitive chemosensor for aqueous oxalate ions in water/DMSO (29:1, v/v) medium. Gradual addition of aqueous oxalate ions to complex 1 led to the in situ formation of L?(4-methyl-2,6-bis-[(2-morpholin-4-yl-ethylimino)-methyl]-phenolate) anion, which shows a single point fluorescence enhancement at 528 nm based on intramolecular charge transfer (ICT) and presents potential turn-on fluorescent properties over other competitive anions. The formation of L? from 1 is supported by UV–vis spectroscopy, mass spectroscopy and single crystal X-ray diffraction study. Detailed spectroscopic studies of 1with respect to oxalate and other anions have been completed in order to check the selectivity, interference, binding ratio, limit of detection (LOD) and other parameters. Probe 1 detects aqueous oxalate ions as low as 0.19 μM at biological pH.

A new phenolato-bridged dinuclear manganese(II) complex as a turn-on fluorosensor for Zn2+ ions via Mn2+ ion replacement

A new synthesized and structurally characterized phenolato bridged di-nuclear manganese(II) complex, formulated as [Mn2L(OAc)2(DMF)2]PF6 (1) (where HL = 4-methyl-2,6-bis-[(2-morpholin-4-yl-ethylimino)-methyl]-phenol and OAc = acetate anion), can act as a turn-on Zn2+ sensing probe through the in situ formation of the corresponding dinuclear Zn(II) complex, [Zn2L(OAc)2]PF6 (2) via direct Mn2+ ion replacement in MeOH/DMF (1/14) medium. The selective and specific fluorescent change due to addition of Zn2+ ions to a solution of 1 enables the detection of Zn2+ ions in dimethylformamide (DMF). The fluorescent dinuclear zinc(II) complex 2 has also been produced through the direct reaction between Zn2+ ions and HL. Both complexes 1 and 2 have been characterized by using physico-chemical and spectroscopic tools, and finally by single crystal X-ray crystallography for a detailed structural determination. The crystallographic investigation indicates that the Mn(II) and Zn(II) ions in the complexes exhibit a distorted octahedral and distorted trigonal bipyramidal coordination geometry, respectively. Interestingly, complex 1 showed very weak fluorescence in solution and no emission in the solid state, whereas complex 2 gave a strong bluish-green coloured fluorescence in both solution and in the solid state, which may be due to the distinct packing of complex 2 compared to 1, as well as to intermolecular hydrogen bonding and C[sbnd]H—π, C[sbnd]H—N and C[sbnd]H—O interactions in the crystal packing, likely playing crucial roles for the fluorescence behavior.

Synthesis, characterization and catalytic activities towards epoxidation of olefins of dinuclear copper(II) complexes

Two copper(II) complexes, [Cu2(L1)Cl3].2H2O (1) and [Cu2(L2)(N3)Cl2] (2) where HL1 = 4-methyl-2,6-bis((2-morpholinoethylimino)methyl)phenol and HL2 = 4-methyl-2,6-bis((3-morpholinopropylimino)methyl)phenol have been synthesized and characterized by elemental analysis, various spectroscopic methods, TGA and single crystal X-ray diffraction analysis. Single crystal X-ray diffraction analysis reveals that in both the complexes, two copper atoms are linked by phenoxo oxygen atom and a bridging ligand, namely chloride and azide, respectively. These complexes have been used as catalyst for the epoxidation of cyclohexene, styrene, α-methyl styrene, trans-stilbene and norbornene using tert-butyl hydroperoxide as the oxidant in acetonitrile under mild conditions. All of the substrates undergo conversion to produce respective epoxide as the major product.