Synthesis, structure, and physical properties of a new phenalenyl-based neutral radical crystal: Correlation between structure and transport properties in carbon-based molecular conductors

2003 ◽  
Vol 95 (6) ◽  
pp. 853-865 ◽  
Author(s):  
X. Chi ◽  
M. E. Itkis ◽  
F. S. Tham ◽  
R. T. Oakley ◽  
A. W. Cordes ◽  
...  
Keyword(s):  
Physical Properties ◽  
Transport Properties ◽  
Molecular Conductors ◽  
Neutral Radical ◽  
Carbon Based

Structural Diversity and Physical Properties of Paramagnetic Molecular Conductors Based on Bis(ethylenedithio)tetrathiafulvalene (BEDT-TTF) and the Tris(chloranilato)ferrate(III) Complex

2014 ◽  
Vol 53 (13) ◽  
pp. 7028-7039 ◽  
Author(s):  
Matteo Atzori ◽  
Flavia Pop ◽  
Pascale Auban-Senzier ◽  
Carlos J. Gómez-García ◽  
Enric Canadell ◽  
...  
Keyword(s):  
Physical Properties ◽  
Structural Diversity ◽  
Molecular Conductors

scholarly journals Donor–anion interactions in quarter-filled low-dimensional organic conductors

2018 ◽  
Vol 5 (4) ◽  
pp. 590-640 ◽  
Author(s):  
Jean-Paul Pouget ◽  
Pere Alemany ◽  
Enric Canadell
Keyword(s):  
Transport Properties ◽  
Essential Role ◽  
Organic Conductors ◽  
Molecular Conductors ◽  
Low Dimensional

In contrast to currently accepted ideas anions play an essential role in directing the structural and transport properties of many molecular conductors.

scholarly journals Chemical Bonding and Physical Properties in Quasicrystals and Their Related Approximant Phases: Known Facts and Current Perspectives

2019 ◽  
Vol 9 (10) ◽  
pp. 2132 ◽  
Author(s):  
Enrique Maciá Barber
Keyword(s):  
Physical Properties ◽  
Transport Properties ◽  
Chemical Bonding ◽  
Structural Design ◽  
Wave Functions ◽  
Underlying Structure ◽  
Transmission Characteristics ◽  
Covalent Bonds ◽  
Self Similar ◽  
Metallic Bonding

Quasicrystals are a class of ordered solids made of typical metallic atoms but they do not exhibit the physical properties that usually signal the presence of metallic bonding, and their electrical and thermal transport properties resemble a more semiconductor-like than metallic character. In this paper I first review a number of experimental results and numerical simulations suggesting that the origin of the unusual properties of these compounds can be traced back to two main features. For one thing, we have the formation of covalent bonds among certain atoms grouped into clusters at a local scale. Thus, the nature of chemical bonding among certain constituent atoms should play a significant role in the onset of non-metallic physical properties of quasicrystals bearing transition-metal elements. On the other hand, the self-similar symmetry of the underlying structure gives rise to the presence of an extended chemical bonding network due to a hierarchical nesting of clusters. This novel structural design leads to the existence of quite diverse wave functions, whose transmission characteristics range from extended to almost localized ones. Finally, the potential of quasicrystals as thermoelectric materials is discussed on the basis of their specific transport properties.

New Family of Aminophenalenyl-Based Neutral Radical Molecular Conductors:  Synthesis, Structure, and Solid State Properties

2005 ◽  
Vol 127 (22) ◽  
pp. 8185-8196 ◽  
Author(s):  
Swadhin K. Mandal ◽  
Mikhail E. Itkis ◽  
Xiaoliu Chi ◽  
Satyabrata Samanta ◽  
David Lidsky ◽  
...  
Keyword(s):  
Solid State ◽  
Molecular Conductors ◽  
Neutral Radical ◽  
New Family

Dimeric Phenalenyl-Based Neutral Radical Molecular Conductors

2001 ◽  
Vol 123 (17) ◽  
pp. 4041-4048 ◽  
Author(s):  
X. Chi ◽  
M. E. Itkis ◽  
K. Kirschbaum ◽  
A. A. Pinkerton ◽  
R. T. Oakley ◽  
...  
Keyword(s):  
Molecular Conductors ◽  
Neutral Radical

scholarly journals Comparing the effect of carbon-based nanofillers on the physical properties of flexible polyurethane foams

2012 ◽  
Vol 47 (15) ◽  
pp. 5673-5679 ◽  
Author(s):  
M. Mar Bernal ◽  
Isabel Molenberg ◽  
Sergio Estravis ◽  
Miguel Angel Rodriguez-Perez ◽  
Isabelle Huynen ◽  
...  
Keyword(s):  
Physical Properties ◽  
Polyurethane Foams ◽  
Flexible Polyurethane ◽  
Carbon Based

Physical properties of electrically conducting and stable molecular neutral radical solid [Co(2,3-Nc)(CN)2]CH3CN (2,3-Nc = 2,3-naphthalocyanine)

2004 ◽  
Vol 08 (11) ◽  
pp. 1258-1268 ◽  
Author(s):  
Toshio Naito ◽  
Naoko Matsumura ◽  
Tamotsu Inabe ◽  
Masaki Matsuda ◽  
Hiroyuki Tajima
Keyword(s):  
Phase Transition ◽  
Magnetic Susceptibility ◽  
Physical Properties ◽  
Thermoelectric Power ◽  
Charge Separation ◽  
Energy Gap ◽  
Reflectance Spectra ◽  
Strongly Correlated ◽  
Neutral Radical ◽  
Type Transition

Solid state properties of dicyano(2,3-naphthalocyaninato)cobalt(III) neutral radical crystal, [ Co (2,3- Nc )( CN )2] CH 3 CN , were characterized by measurements of the resistivity under high pressure and under uniaxial strain, thermoelectric power, magnetic susceptibility, ESR and polarized reflectance spectra. The title compound exhibited thermally activated-type electrical conductivity along the c-axis. The room temperature (RT) resistivity ρRT along the c-axis and activation energy Ea rapidly decreased with increasing pressure. The temperature-dependent thermoelectric power S was that of a typical one-dimensional (1D) semiconductor. However the high absolute value of S suggested that this electronic system should be strongly correlated. Although the electrical resistivity exhibited monotonous temperature-dependence, the magnetic susceptibility clearly indicated a Peierls-type transition and marked fluctuation from RT. Both Peierls-type transitions and fluctuations are characteristic phenomena to 1D conductors. Furthermore ESR spectra manifested that the Peierls-type transition occurred at 100 K. The inconsistency between the electrical behavior (without a phase-transition) and magnetic behavior (with a phase-transition) indicates separation of the degrees of freedom in spin and charge (spin-charge separation) of this material. Spin-charge separation is a theoretically predicted phenomenon peculiar to the 1D conductors with strong correlation. The reflectance spectra were quantitatively explained by a 1D Hubbard model, and manifested the existence of a structural fluctuation of this material from RT. Based on these observed physical properties it is concluded that [ Co (2,3- Nc )( CN )2] CH 3 CN is a strongly correlated 1D semiconductor with a Mott(Hubbard) type energy gap and characterised with a fluctuation and spin-charge separation.

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