Coordination assembling of nickel tetrathiooxalate on surface of CdS nanocrystals

Guo, Lin; Dai, Jie; Bian, Guo‐Qing; Jia, Dingxian; Zhu, Qian‐Jiang; Zhang, Jiasheng

doi:10.1016/j.inoche.2003.08.011

Cited by 2 publications

(4 citation statements)

References 24 publications

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“…CS stretching frequencies are located at 1182 (s) and 1155 (sh) cm −1 . These values are very close or similar to those reported for Ni(tto) capped CdSnanocrystals (1182 and 1151 cm −1 ) [4]. Moreover, the mode at 1019 cm −1 in the IR spectrum of our samples is also present in the spectrum for ultrathin Ni(tto) films (1025 cm −1 ) [22].…”

Section: Resultssupporting

confidence: 90%

“…(Figure 6). These values are similar to those for bulk Ni(tto) (1168 and 1113 cm −1 ) [4]. IR spectra do not show bands assigned to PEG.…”

Section: Resultssupporting

confidence: 85%

“…Indeed, traces of counter ion as (NEt 4 ) + is still possible, alike traces of K + in poly[Ni-tto] (P3) in [12], which will induce slight changes in the electronic structure of the Ni(tto) fragment. Moreover, electron transfer between metal and ligand is not rare within the Ni(C 2 S 4 ) fragment, whatever its native degree of charge of the metal or the ligand (tto 2− or ett 4 The authors of this article assigned the decrease of χ m T vs. T to interchain antiferromagnetic couplings. Furthermore, bulk Ni(tto) also presents antiferromagnetic exchange interactions for T < 40 K [1].…”

Section: Resultsmentioning

confidence: 91%

“…The conductivity value depends on the nature of the starting nickel salt, the solvent and the temperature used for their synthesis [1]. This conducting polymer has been processed as composites with poly(vinyl alcohol) [2], as self-assembled ultrathin films [3] or as coatings on CdS nanocrystals [4].…”

Section: Introductionmentioning

confidence: 99%

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Synthesis and Characterization of the Thermoelectric Nickel Tetrathiooxalate Polymer as Nanoparticles

Faulmann¹,

Cormary²,

de³

et al. 2020

MSCE

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Nanoparticles of the conductive coordination polymer Ni(tto) have been synthesized under mild conditions in the presence of bio-based polyesters or polyethylene glycol acting as growth controlling agents. With polyesters, aggregates of particles are observed whereas well dispersed nanoparticles are obtained with polyethylene glycol. Indeed, for a Ni 2+ /polyethylene glycol weight ratio of 0.031, transmission electron micrographs evidence dispersed particles exhibiting sizes in the 3-10 nm range. Infrared spectra for nanopowders show two CS stretching modes in the 1100-1190 cm −1 range, confirming the presence of the tetrathiooxalate ligand coordinated to the nickel center. The room-temperature electrical conductivity for the nanopowder prepared in the presence of polyethylene glycol is about 0.8 S•cm −1 , a decent value for tetrathiolate-based polymers. Finally, magnetic susceptibility measurements for well-dispersed Ni(tto) particles evidence a Curie-Weiss law in a large temperature range. Moreover, low temperatures measurement would confirm intra-or interchain interactions between nickel atoms within the Ni(tto) polymer chains.

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Section: Resultssupporting

confidence: 90%

“…(Figure 6). These values are similar to those for bulk Ni(tto) (1168 and 1113 cm −1 ) [4]. IR spectra do not show bands assigned to PEG.…”

Section: Resultssupporting

confidence: 85%