https://hal.archives-ouvertes.fr/jpa-00239583/document

Il nuovo cimento

The nature of metal complexes of heterocyclic thiosemicarbazones reported in the literature through 1989 have been reviewed with an emphasis on variations in stoichiometry and stereochemistry. A brief introduction is followed by a survey of the biological activity of the uncomplexed thiosemicarbazones. Next is a section on the chemical nature of thiosemicarbazones including a discussion of preparative methods, modes of coordination and isomerism. This is followed by a discussion of structural information and biological activity of the iron(III), iron(II), copper(II), cobalt(III), cobalt(II) and nickel(II) complexes of heterocyclic thiosemicarbazones. Short sections on the biological activity of other chelating thiosemicarbazones and metal complexes are also included.

Structural and physical correlations in the biological properties of transition metal heterocyclic thiosemicarbazone and S -alkyldithiocarbazate complexes

Titanium oxide (TiO2 ) has been commonly used as an electron transport layer (ETL) of regular-structure perovskite solar cells (PSCs), and so far the reported PSC devices with power conversion efficiencies (PCEs) over 21% are mostly based on mesoporous structures containing an indispensable mesoporous TiO2 layer. However, a high temperature annealing (over 450 °C) treatment is mandatory, which is incompatible with low-cost fabrication and flexible devices. Herein, a facile one-step, low-temperature, nonhydrolytic approach to in situ synthesizing amino-functionalized TiO2 nanoparticles (abbreviated as NH2 -TiO2 NPs) is developed by chemical bonding of amino (-NH2 ) groups, via TiN bonds, onto the surface of TiO2 NPs. NH2 -TiO2 NPs are then incorporated as an efficient ETL in n-i-p planar heterojunction (PHJ) PSCs, affording PCE over 21%. Cs0.05 FA0.83 MA0.12 PbI2.55 Br0.45 (abbreviated as CsFAMA) PHJ PSC devices based on NH2 -TiO2 ETL exhibit the best PCE of 21.33%, which is significantly higher than that of the devices based on the pristine TiO2 ETL (19.82%) and is close to the record PCE for devices with similar structures and fabrication procedures. Besides, due to the passivation of the surface trap states of perovskite film, the hysteresis of current-voltage response is significantly suppressed, and the ambient stability of devices is improved upon amino functionalization.

Low-Temperature In Situ Amino Functionalization of TiO2 Nanoparticles Sharpens Electron Management Achieving over 21% Efficient Planar Perovskite Solar Cells.

As one of the most toxic heavy metals, mercury ion (Hg 2+ ) has become a concern focus for its severe threats to environment and human health. As a result, it is of great importance to develop novel methods to realize the recognition and quantification of Hg 2+ . The past decades witness the development of nanomaterial-based optical sensors for Hg 2+ detection, showing the benefits of simplicity, rapidity, high sensitivity and selectivity, and cost-effectiveness. The reported methods have allowed the detectability down to nanomolar concentrations or much lower levels, and proved their practical applications for detecting and quantifying Hg 2+ in synthetic solutions or natural water samples. In this review, we summarize the published innovations in nanomaterial-based optical sensors for the detection of Hg 2+ according to different sensing strategies, including colorimetric, fluorescent and surface enhanced Raman scattering detection. Moreover, some challenges and significant attempts related to these methods are also discussed.

http://ir.yic.ac.cn/bitstream/133337/17510/1/Nanomaterial-based%20optical%20sensors%20for%20mercury%20ions.pdf

Nanomaterial-based optical sensors for mercury ions

Facile synthesis of Cu(II) impregnated biochar with enhanced adsorption activity for the removal of doxycycline hydrochloride from water.

2,6-Diacetylpyridinesalicylaldazine (H2daps) forms complexes [Ni(H2daps)ClH2O]Cl, [M(H2daps)Cl2H2O] (M = Mn, Co, Cu or Zn) and [M(daps)(H2O)2] (M = Mn, Co, Ni, Cu or Zn) which have been characterized by elemental analyses, physicochemical methods, spectroscopy and X-ray powder diffraction.

2,6-Diacetylpyridinesalicylaldazine complexes of bivalent metal ions

Metal(II) complexes of 2-acetylthiophene-2-furoylhydrazone (HL) of the types [VO(HL)SO4], [Cu(HL)2Cl2(H2O)], [M(HL)2Cl2] [M=CoII, NiII, or ZnII] and [ML2(H2O)2] [M=CoII, NiII, CuII or ZnII] have been prepared and characterized on the basis of elemental analyses, molar conductance, magnetic susceptibility, visible, e.s.r. and i.r. spectral studies. The bonding and stereochemistry of the complexes are discussed.

Studies on 2-acetylthiophene-2-furoylhydrazone complexes of 3d-bivalent metal ions

A new series of 2,5-bis(4-n-alkoxybenzoyloxy)-3,6-dichloro-1,4-benzoquinones, C6Cl2O2(OOCC6H4OR)2 and their copper (II) compounds, C6Cl2O2(OOCC6H4OR)2 Cu(CH3COO)2·H2O where R˭CmH2m+1 and m = 6,7,8,9,10, 11,12,14, and 16 have been synthesized. The compounds have been characterized by elemental analyses, fourier transform infrared (FTIR) far IR, 1H, and 13C NMR spectra. The UV-Visible, electron spin resonance (ESR), and magnetic susceptibility studies of the copper compounds have also been made. Mesomorphic properties of these compounds were studied by differential scanning calorimetry and polarizing microscopy. The mesomorphic nature of these compounds depends on the alkoxy chain length. The compounds (m = 6, 7, 8, 14) exhibit the nematic mesophase. Compound (m = 9)shows a nematic mesophase in heating cycle and both a nematic and a smectic A mesophase in the cooling cycle, whereas compound (m = 10) shows enantiotropic nematic and smectic A mesophases. Compound (m = 11) shows a monotropic smectic A mesophas...

Liquid-Crystalline Properties of 2,5-Bis(4-n-Alkoxybenzoyloxy)-3,6-Dichloro-1,4-Benzoquinones and Their Copper (II) Complexes—Synthesis and Characterization

Glutaric dihydrazide (GDH) and adipic dihydrazide (ADH) have been found to react with Co(II) chloride and Ni(II) chloride and nitrate in ethanolic solution to form complexes of the general empirical compositionsMLCl2,ML2Cl2 and [NiL2(H2O)2] (NO3)2 whereM=Co(II), Ni(II) andL=GDH,ADH. Tetrahedral geometry has been proposed for 1∶1 complexes of Co(II) and octahedral geometry for the remaining complexes based on measurements of molar conductance, magnetic susceptibility, electronic and ir spectra.

Synthesis and structural studies of Co(II) and Ni(II) complexes of glutaric- and adipic dihydrazides

The chelating behaviour of neutral N-salicylidene-2-aminobenzophenone-2-thenoylhydrazone (H2sabth) and deprotonated sabth has been investigated in the complexes of the types VO(H2sabth)SO4, M(H2sabth)Cl2, VO(sabth) and M(sabth)(H2O)2 [M = Mn(II), Co(II), Ni(II) and Cu(II)]. The complexes have been characterized by elemental analyses, molar conductance, magnetic susceptibility, cyclic voltammetry, F.SR, electronic and IR spectral studies. The stereochemistry of the complexes is discussed.

Bachcha Singh

Papers

2,6-Diacetylpyridinesalicylaldazine complexes of bivalent metal ions

Studies on 2-acetylthiophene-2-furoylhydrazone complexes of 3d-bivalent metal ions

Liquid-Crystalline Properties of 2,5-Bis(4-n-Alkoxybenzoyloxy)-3,6-Dichloro-1,4-Benzoquinones and Their Copper (II) Complexes—Synthesis and Characterization

Synthesis and structural studies of Co(II) and Ni(II) complexes of glutaric- and adipic dihydrazides

Studies on N-Salicylidene-2-Aminobenzophenone-2-Thenoylhydrazone Complexes with Some Bivalent Metal Ions