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  4. Supramolecular approach to the synthesis of [60]fullerene-metal dithiocarbamate complexes, {(M-II(R(2)dtc)(2))(x)center dot L}center dot C-60 (M = Zn, Cd, Hg, Fe, and Mn; x=1 and 2). The study of magnetic properties and photoconductivity
 
research article

Supramolecular approach to the synthesis of [60]fullerene-metal dithiocarbamate complexes, {(M-II(R(2)dtc)(2))(x)center dot L}center dot C-60 (M = Zn, Cd, Hg, Fe, and Mn; x=1 and 2). The study of magnetic properties and photoconductivity

Konarev, Dmitri V.
•
Khasanov, Salavat S.
•
Kovalevsky, Andrey Yu.
Show more
2008
Crystal Growth & Design

Coordination assemblies formed by metal(II) dithiocarbamates M-II(R(2)dtc)2 (M = Zn, Cd, Hg, Mn, and Fe; R = Me, Et, iPr, nPr, and nBu) and nitrogen-containing ligands (L = DABCO, DMP, and HMTA) are shown to be sterically well consistent with the spherical shape of fullerenes and are effectively cocrystallized with them to form complexes {(M-II(R(2)dtc)(2))(x)center dot L}center dot C-60 (x = 1 and 2) with layered or three-dimensional (31)) packing of fullerene molecules (1-11). For the first time the molecular structures of the M-II(R2dtc)2 assemblies in the complexes with C60 are presented (including those with M = Mn, Fe, and Hg). According to optical and electron paramagnetic resonance (EPR) spectroscopy 1-11 have a neutral ground state. Magnetic susceptibilities of {M-II(Et(2)dtc)(2)center dot DABCO}center dot C-60 center dot(DABCO)(2) (M = Mn and Fe) follow the Curie-Weiss law in the 50-300 K range with the Weiss constants Theta = 0.35 and 1.70 K, respectively. Magnetic moments of the complexes equal to 8.23 and 6.88 mu(B) at 300 K correspond to the high-spin state of the Mn-II (S = 5/2) and Fe-II (S = 2) ions. The increase of mu(eff) observed below 35 and 50 K up to 8.5 mu(B) (at 3 K) and 7.4 mu(B) (at 6 K) indicates the manifestation of short-range ferromagnetic interactions between M-II spins in the isolated M-II(Et(2)dtc)(2)-DABCO dimers. Under illumination by white light, the complexes show up to 102 times increase of photocurrent. The main contribution to the generation of free charge carriers is provided by direct charge transfer from {M-II(R(2)dtc)(2)}(2)center dot L to C-60. It was found that photocurrent increases in magnetic field with induction B < 1T.

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Type
research article
DOI
10.1021/cg0702481
Web of Science ID

WOS:000254649300017

Author(s)
Konarev, Dmitri V.
Khasanov, Salavat S.
Kovalevsky, Andrey Yu.
Lopatin, Dmitri V.
Rodaev, Vyacheslav V.
Saito, Gunzi
Nafradi, Balint  
Forro, Laszlo  
Lyubovskaya, Rimma N.
Date Issued

2008

Published in
Crystal Growth & Design
Volume

8

Start page

1161

End page

1172

Subjects

Electron-Paramagnetic-Resonance

•

Ionic Multicomponent Complexes

•

Transition-Metal-Complexes

•

Crystal-Structure

•

Fullerenes C-60

•

Molecular-Structure

•

C-70

•

C-60(Center-Dot-)

•

Coordination

•

Adduct

Editorial or Peer reviewed

REVIEWED

Written at

EPFL

EPFL units
LPMC  
Available on Infoscience
November 30, 2010
Use this identifier to reference this record
https://infoscience.epfl.ch/handle/20.500.14299/61495
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