scholarly journals A DFT analysis of the ground and charge-transfer excited states of Sc3N@Ih–C80 fullerene coupled with metal-free and zinc-phthalocyanine

2018 ◽  
Vol 20 (40) ◽  
pp. 25841-25848 ◽  
Author(s):  
Fatemeh Amerikheirabadi ◽  
Carlos Diaz ◽  
Neetha Mohan ◽  
Rajendra R. Zope ◽  
Tunna Baruah

Ground and charge transfer excited states of two co-facial donor–acceptor conjugates formed by noncovalent coupling of Sc3N@–C80 with H2Pc and ZnPc chromophores are investigated using DFT calculations.

2016 ◽  
Vol 4 (4) ◽  
pp. 597-607 ◽  
Author(s):  
Roberto S. Nobuyasu ◽  
Zhongjie Ren ◽  
Gareth C. Griffiths ◽  
Andrei S. Batsanov ◽  
Przemyslaw Data ◽  
...  

2021 ◽  
Author(s):  
Chen Zhu ◽  
Serik Zhumagazy ◽  
Huifeng Yue ◽  
Magnus Rueping

Metal-free C-Se cross-couplings via the formation of electron-donor-acceptor (EDA) complexes have been developed. The visible-light induced reactions can be applied for the synthesis of a series of unsymmetrical diaryl selenides...


2018 ◽  
Vol 54 (6) ◽  
pp. 666-669
Author(s):  
Hucheng Zhang ◽  
Mengmeng Wang ◽  
Jing Zhao ◽  
Shitao Han ◽  
Haixia Cheng ◽  
...  

The charge transfer and active sites of metal-free imidazolium-based composites were unveiled by an electrochemical method with high sensitivity and selectivity due to the specific donor–acceptor coupling of imidazolium with NO2−.


2019 ◽  
Vol 151 (11) ◽  
pp. 114109 ◽  
Author(s):  
Takatoshi Fujita ◽  
Yoshifumi Noguchi ◽  
Takeo Hoshi

2019 ◽  
Vol 131 (17) ◽  
pp. 5768-5773 ◽  
Author(s):  
Ruben Canton‐Vitoria ◽  
Habtom B. Gobeze ◽  
Vicente M. Blas‐Ferrando ◽  
Javier Ortiz ◽  
Youngwoo Jang ◽  
...  

2007 ◽  
Vol 3 (1) ◽  
pp. 1-12 ◽  
Author(s):  
María Moreno Oliva ◽  
Mari Carmen Ruiz Delgado ◽  
Juan Casado ◽  
M. Manuela M. Raposo ◽  
A. Maurício C. Fonseca ◽  
...  

series of push-pull chromophores built around thiophene-based . π-conjugating spacers and bearing various types of amino-donors and cyanovinyl-acceptors have been analyzed by means of UV-Vis- NIR spectroscopic measurements. Density functional theory (DFT) calculations have also been performed to help the assignment of the most relevant electronic features and to derive useful information about the molecular structure of these NLO-phores. The effects of the donor/acceptor substitution in the electronic and molecular properties of the .π -conjugated spacer have been addressed. The effectiveness of the intramolecular charge transfer (ICT) has also been tested as a function of the nature of the end groups (i.e., electron-donating or electron-withdrawing capabilities).


2016 ◽  
Vol 4 (5) ◽  
pp. 653-653 ◽  
Author(s):  
Roberto S. Nobuyasu ◽  
Zhongjie Ren ◽  
Gareth C. Griffiths ◽  
Andrei S. Batsanov ◽  
Przemyslaw Data ◽  
...  

2019 ◽  
Vol 58 (17) ◽  
pp. 5712-5717 ◽  
Author(s):  
Ruben Canton‐Vitoria ◽  
Habtom B. Gobeze ◽  
Vicente M. Blas‐Ferrando ◽  
Javier Ortiz ◽  
Youngwoo Jang ◽  
...  

1996 ◽  
Vol 51 (11) ◽  
pp. 1521-1537 ◽  
Author(s):  
Hans Bock ◽  
Mark Sievert ◽  
Holger Schödel ◽  
Markus Kleine

The following mixed-stack donor/acceptor complexes {D · · · A }∞ have been crystallized and their structures determined: { 1 ,2,4,5-tetramethylbenzene · · · tetrabromo-p -benzoquinone}∞ , {hexamethylbenzene · · · tetrabromo-p-benzoquinone}∞ , { ( 1 ,2 ,4,5-tetramethyl-benzene)2 · · · tetrachloro -p -benzoquinone}∞ , {pyrene · · · tetrafluoro-p-benzoquinone}∞ , {pyrene · · · tetrabromo-p-benzoquinone}∞ and {perylene · · · tetrabromo-p-benzoquinone}∞ . They exhibit an interesting lattice packing, especially the 2:1 tripeldecker sandwich of tetrachloro-p-benzoquinone, which crystallizes in a herringbone pattern. Their interplanar distances are around 340 pm, i. e. two van der Waals π radii. None of them , however, exhibits in neither the donor nor the acceptor components significant structural changes due to complex formation. Their colours range from orange-red to black in the crystal and to green in H2CCl2 solution. Their long-wavelengths charge transfer absorption maxim a correspond to a lowering in excitation energy of up to 2 eV relative to that of the components. The different charge transfer in the ground and excited states of the donor/acceptor complexes investigated is further discussed referring to data such as cyclovoltammetric reduction potentials as w ell as to results from semiempirical calculations based on the crystal structure data determined and including configuration interaction.


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