scholarly journals Quantum dimer model containing Rokhsar-Kivelson point expressed by spin- 12 Heisenberg antiferromagnets

2020 ◽  
Vol 101 (17) ◽  
Author(s):  
Yuhei Hirose ◽  
Akihide Oguchi ◽  
Yoshiyuki Fukumoto
Keyword(s):  
Dimer Model ◽  
Heisenberg Antiferromagnets

1,1’-Biaceanthrylene and 2,2'-Biaceanthrylene: Models for Linking Larger Polycyclic Aromatic Hydrocarbons via Five-Membered Rings

2019 ◽  
Author(s):  
Yachu Du ◽  
Kyle Plunkett
Keyword(s):  
Polycyclic Aromatic Hydrocarbons ◽  
Polycyclic Aromatic Hydrocarbon ◽  
Aromatic Hydrocarbon ◽  
Electronic Properties ◽  
Aromatic Hydrocarbons ◽  
Model Systems ◽  
Redox Potentials ◽  
Dimer Model ◽  
Optical And Electronic Properties ◽  
Polycyclic Aromatic

We show that polycyclic aromatic hydrocarbon (PAH) chromophores that are linked between two five-membered rings can access planarized structures with reduced optical gaps and redox potentials. Two aceanthrylene chromophores were connected into dimer model systems with the chromophores either projected outward (2,2’-biaceanthrylene) or inward (1,1’-biaceanthrylene) and the optical and electronic properties were compared. Only the planar 2,2’-biaceanthrylene system showed significant reductions of the optical gaps (1 eV) and redox potentials in relation to the aceanthrylene monomer.<br>

1,1’-Biaceanthrylene and 2,2'-Biaceanthrylene: Models for Linking Larger Polycyclic Aromatic Hydrocarbons via Five-Membered Rings

2019 ◽  
Author(s):  
Yachu Du ◽  
Kyle Plunkett
Keyword(s):  
Polycyclic Aromatic Hydrocarbons ◽  
Polycyclic Aromatic Hydrocarbon ◽  
Aromatic Hydrocarbon ◽  
Electronic Properties ◽  
Aromatic Hydrocarbons ◽  
Model Systems ◽  
Redox Potentials ◽  
Dimer Model ◽  
Optical And Electronic Properties ◽  
Polycyclic Aromatic

We show that polycyclic aromatic hydrocarbon (PAH) chromophores that are linked between two five-membered rings can access planarized structures with reduced optical gaps and redox potentials. Two aceanthrylene chromophores were connected into dimer model systems with the chromophores either projected outward (2,2’-biaceanthrylene) or inward (1,1’-biaceanthrylene) and the optical and electronic properties were compared. Only the planar 2,2’-biaceanthrylene system showed significant reductions of the optical gaps (1 eV) and redox potentials in relation to the aceanthrylene monomer.<br>

scholarly journals Staggered flux state for rectangular-lattice spin- 12 Heisenberg antiferromagnets

2020 ◽  
Vol 102 (21) ◽  
Author(s):  
N. E. Shaik ◽  
B. Dalla Piazza ◽  
D. A. Ivanov ◽  
H. M. Rønnow
Keyword(s):  
Rectangular Lattice ◽  
Lattice Spin ◽  
Heisenberg Antiferromagnets ◽  
Flux State

Efficient Ni Based Catalysts for Hydrotreatment of Lignin Dimer Model Compounds to Cycloalkanes/Cycloalkanols

2021 ◽  
Author(s):  
Changzhou Chen ◽  
Dichao Wu ◽  
Peng Liu ◽  
Haihong Xia ◽  
Minghao Zhou ◽  
...  
Keyword(s):  
Noble Metal ◽  
Low Cost ◽  
Great Success ◽  
Model Compounds ◽  
Efficient Catalyst ◽  
Dimer Model ◽  
Catalytic Cleavage

Noble-metal catalytic cleavage of the ether bonds in lignin to obtain aromatic chemicals had achieved great success, and development of a low-cost and efficient catalyst was crucial. Herein, NixLay/CNT was...

Existence of N�el order in some spin-1/2 Heisenberg antiferromagnets

1988 ◽  
Vol 53 (5-6) ◽  
pp. 1019-1030 ◽  
Author(s):  
Tom Kennedy ◽  
Elliott H. Lieb ◽  
B. Sriram Shastry
Keyword(s):  
Heisenberg Antiferromagnets
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