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

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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.

Trivalent lanthanide complexes of the general formula [Ln(Habth)2Cl2]Cl [Ln = La(III), Pr(III), Nd(III), Sm(III), Eu(III), Gd(III), Tb(III) and Dy(III); Habth = 2-aminobenzo-phenone-2-thenoylhydrazone] were prepared and characterized using magnetic moments, molar conductance and UV_VIS, IR and emission spectroscopy.

Lanthanide Complexes of 2-Aminobenzophenone-2-thenoylhydrazone: Synthesis and Structural Characterization

The reaction of triethylene tetra amine and di et hyl oxalate yie ld a 12-membered macrocycle. The co mplexes [Ln(tadd)CI 2(H 20h]CI (Ln(lII) = La, Pr, Nd, Sm, Eu , Gd, Tb and Dy; tadd = 1,4,7,1 O-tetraazacyclo dodecane-2, 3-d ione) have been sy nthesized by te mpl ate reacti(')n of the lanthanide ion. The complex [La(tadd)Cl 2(H 20 )2]CI react s with lanthanide ch lorides to yie l.d th e complexes of type [2{La( tadd)CI2(H20h}LnCI3(H20)2]CI2. The chemical compositions of both th e mono and trimetallic co mpl exes · have bee n establi shed from anal ytical, molar co nductance and FAB mass data. It is obse rved th at the macrocyd e is bonded in tetraki s fashion in the former complexes and hexaki s in the latter. Th e coordin ation number eight aro und the encapsul ated metal ion s and nin e around the exocycli c oxygen bonded metal ions are es tablished from IR and electronic spectra. The symmetry of th e ligand fi eld around the metal ions is indicated from th e emi ss ion spectra.

http://nopr.niscair.res.in/bitstream/123456789/15835/1/IJCA%2038A%288%29%20802-807.pdf

Synthesis and characterization of mono and trinuclear lanthanide (III) complexes of 12-membered tetraaza macrocycle

The lanthanide complexes of stiboglueonate [C12H17O17Sb2]3−- (SG) having the formula Na3[Ln(SG)2] [Ln = La(III), Pr(III), Nd(III), Sm(III), Eu(III), Gd(III), Tb(III) and Dy(III)] have been synthesized. These complexes were characterized on the basis of analytical data and TGA and DTA, magnetic susceptibility and infrared, electronic and emission spectroscopy. Results of infrared spectroscopy suggest bonding of SG through the carboxylate moiety. The hypersensitive band profile of the Nd(III) complex indicated a coordination number of eight. The emission spectra suggested low symmetry without an inversion centre for the europium(III) complex and high symmetry for the terbium(III) complex.

Synthesis and characterization of some lanthanide complexes of stibanate

Comparative evaluation of Bis(thiosemicarbazone)- Biotin and Met-ac-TE3A for tumor imaging.

The reaction of 1,8-diamino-3,6-diazaoctane and diethyl malonate in dry methanol yielded a 13-membered macrocycle. Complexes of the type [Ln(tatd)Cl2 (H2O)3]Cl [LnIII=La, Pr, Nd, Sm, Eu, Gd, Tb, Dy; tatd=1, 5, 8, 11-tetra-azacyclotridecane-2,4-dione] have been synthesized by template condensation. The complex [La(tatd)Cl2 (H2O)3]Cl in methanol was reacted with lanthanide chlorides to yield the trinuclear complexes of type [2{La(tatd)Cl2(H2O)3}LnCl3]Cl2 [LnIII=La, Pr, Nd, Sm, Eu, Gd, Tb, Dy]. The chemical compositions of mono and trinuclear complexes have been established on the basis of analytical, molar conductance, electrospray (ES) and fast atom bombardment (FAB) mass data. In mononuclear complexes the Ln3+ ion is encapsulated by four ring nitrogens and in trimetallic complexes the exo-carbonyl oxygens of two mononuclear units coordinate to the Ln3+ ions resulting in a polyhedron around the lanthanide ions. Thus the macrocycle is bonded in a tetradentate fashion in the former complexes and hexadentate in the latter. The coordination number nine around the encapsulated Ln3+ and seven around the exo-oxygen bonded Ln3+ ions are established. The symmetry of the ligand field around the metal ions is indicated from the emission spectra.

/pdf/mono-and-trinuclear-lanthanide-complexes-of-13-membered-3hvk3jbbjv.pdf

Bachcha Singh

Papers

Lanthanide Complexes of 2-Aminobenzophenone-2-thenoylhydrazone: Synthesis and Structural Characterization

Synthesis and characterization of mono and trinuclear lanthanide (III) complexes of 12-membered tetraaza macrocycle

Synthesis and characterization of some lanthanide complexes of stibanate

Comparative evaluation of Bis(thiosemicarbazone)- Biotin and Met-ac-TE3A for tumor imaging.

Mono and trinuclear lanthanide complexes of 13-membered tetraaza macrocycle: Synthesis and characterization