Electrochemical and spectroelectrochemical characterization of covalently-linked donor–acceptor model compound

1998 ◽  
Vol 43 (18) ◽  
pp. 2693-2698 ◽  
Author(s):  
Jie Zhang ◽  
Hao-ran Sun ◽  
Guo-yu Yang ◽  
Ke Wen ◽  
Lian-xiang Yu ◽  
...  
Keyword(s):  
Model Compound ◽  
Donor Acceptor ◽  
Covalently Linked

Phthalocyanine-corannulene conjugates: Synthesis, complexation studies with a pyridyl-functionalized C60 fullerene, and photophysical properties

2020 ◽  
Vol 24 (01n03) ◽  
pp. 410-415 ◽  
Author(s):  
Juan A. Suanzes ◽  
Sumit Chaurasia ◽  
Rafael M. Krick Calderon ◽  
Dirk M. Guldi ◽  
Giovanni Bottari ◽  
...  
Keyword(s):  
Photophysical Properties ◽  
Supramolecular Interactions ◽  
C60 Fullerene ◽  
Time Resolved ◽  
Complexation Studies ◽  
Donor Acceptor ◽  
Photophysical Studies ◽  
Covalently Linked ◽  
Photoinduced Charge

We report here the synthesis and characterization of some novel Zn(II)phthalocyanine (Pc)-corannulene conjugates and their complexation ability towards a pyridyl-functionalized C[Formula: see text] fullerene through metal-ligand supramolecular interactions. Steady-state and time-resolved photophysical studies carried out on these electron donor–acceptor (D–A) Zn(II)Pc-corannulene/C[Formula: see text] ensembles indicate the formation of photogenerated charge-separated species. Interestingly, a stabilization of the photoinduced charge-separated state is observed in the case of the D–A supramolecular complexes comprising the corannulene-substituted Zn(II)Pcs when compared to their non-corannulene functionalized Zn(II)Pc analogues. We rationalize this stabilizing effect of the charge-separated state exerted by the corannulene as a result of the increased [Formula: see text]-extension and augmented hydrophobicity of the Zn(II)Pc core by the covalently-linked polyaromatic hydrocarbon (PAH) fragment.

Single-wall carbon nanotube porphyrin nanoconjugates

2007 ◽  
Vol 11 (06) ◽  
pp. 442-447 ◽  
Author(s):  
Christian Ehli ◽  
Stéphane Campidelli ◽  
Fulvio G. Brunetti ◽  
Maurizio Prato ◽  
Dirk M. Guldi
Keyword(s):  
Excited State ◽  
Carbon Nanotube ◽  
Transient Absorption ◽  
Spectroscopic Characterization ◽  
Single Wall Carbon Nanotube ◽  
Single Wall Carbon ◽  
Low Degree ◽  
Donor Acceptor ◽  
Covalently Linked

We describe the synthesis, microscopic and spectroscopic characterization of a novel donor-acceptor prototype, namely, a single wall carbon nanotube (SWNT) nanoconjugate bearing a covalently linked free base porphyrin ( H 2 P ). In the characterized SWNT- H 2 P nanoconjugate the electronic features of SWNT are largely retained, when compared to pristine SWNT. In fact, carefully controlled reaction conditions lead to a low degree of SWNT functionalization, as evidenced by the preservation of the SWNT van Hove singularities. As a consequence, the overall SWNT loading with H 2 P is so low that in the ground state, the H 2 P features are barely seen, which is different from the excited state, where features of H 2 P are clearly discernable. For example, fluorescence and transient absorption characteristics corroborate, unequivocally, the formation of the H 2 P singlet excited state, which is, however, impacted by the presence of SWNT.

Identification and Characterization of Redox Sites in Supramolecular Systems and Their Relevance for the Design of Photoactive Devices. Ru(II)/C60-Based Donor-Acceptor Dyads

2001 ◽  
Vol 66 (2) ◽  
pp. 276-290 ◽  
Author(s):  
Maurizio Carano ◽  
Paola Ceroni ◽  
Michele Maggini ◽  
Massimo Marcaccio ◽  
Enzo Menna ◽  
...  
Keyword(s):  
Ruthenium Complex ◽  
Azomethine Ylide ◽  
Electronic Interactions ◽  
Redox Sites ◽  
Ligand Charge Transfer ◽  
Donor Acceptor ◽  
Dinuclear Ruthenium ◽  
Photophysical Studies ◽  
Covalently Linked

Two dyads consisting of a mononuclear or a dinuclear ruthenium complex covalently linked to a fullerenopyrrolidine through a rigid androstane spacer, have been prepared through azomethine ylide cycloaddition to C60. Electrochemical and photophysical studies revealed that ground-state electronic interactions between the dinuclear ruthenium chromophore and the fullerenopyrrolidine moiety are small. The redox series observed for the dyads correspond to the superimposition of the reduction patterns of the fullerene core and of the Ru(II)-bipyridine moieties. The results of the electrochemical investigation allow us to rationalize the photophysical behaviour of the two species by identifying the thermodynamically allowed and forbidden routes for the deactivation of the Ru-based metal-to-ligand charge transfer (MLCT) excited state.

Synthesis and Characterization of a New Donor–Acceptor Conjugated Polymer and Polymer∕Ag Nanocomposites

2011 ◽  
Author(s):  
M. G. Murali ◽  
D. Udayakumar ◽  
P. Predeep ◽  
Mrinal Thakur ◽  
M. K. Ravi Varma
Keyword(s):  
Conjugated Polymer ◽  
Synthesis And Characterization ◽  
Donor Acceptor

Synthesis of covalently-linked linear donor-acceptor copolymers containing porphyrins and oligothiophenes

2010 ◽  
Vol 22 (8) ◽  
pp. 779-781 ◽  
Author(s):  
Chuan-Song Duanmu ◽  
Zhang-Ping Chen ◽  
Xue-Song Yu ◽  
Xiang Zhou
Keyword(s):  
Donor Acceptor ◽  
Covalently Linked

scholarly journals 2,6-Di(thiophenyl)-1,5-dihydrodipyrrolopyrazine (DT-DPP) structural isomers as donor–acceptor–donor molecules and their optoelectronic investigation

RSC Advances ◽  
2017 ◽  
Vol 7 (62) ◽  
pp. 39228-39236 ◽  
Author(s):  
Puttavva Meti ◽  
Young-Dae Gong
Keyword(s):  
Synthesis And Characterization ◽  
Coupling Reactions ◽  
Structural Isomers ◽  
Donor Acceptor ◽  
Optoelectronic Applications

We report the synthesis and characterization of two new D–A–D molecules via Pd catalyzed C–C and C–N coupling reactions. This illustrates the potential of DT-DPP for promising optoelectronic applications.

Synthesis and Characterization of Covalently Linked Single-Stranded DNA Oligonucleotide−Dendron Conjugates

2003 ◽  
Vol 14 (2) ◽  
pp. 488-493 ◽  
Author(s):  
Stephen A. Bell ◽  
Megan E. McLean ◽  
Sang-Keun Oh ◽  
Shane E. Tichy ◽  
Wen Zhang ◽  
...  
Keyword(s):  
Synthesis And Characterization ◽  
Single Stranded Dna ◽  
Covalently Linked

Preparation and Characterization of Glycyrrhizin-Graphene Hybrid Materials

2012 ◽  
Vol 531 ◽  
pp. 145-148
Author(s):  
Zong Hua Wang ◽  
Yan Li Gao ◽  
Jian Fei Xia ◽  
Fei Fei Zhang ◽  
Yan Zhi Xia ◽  
...  
Keyword(s):  
Electron Transfer ◽  
Hybrid Materials ◽  
Model Compound ◽  
Carbon Electrode ◽  
The Novel ◽  
Electron Transfer Process ◽  
Efficient Energy ◽  
Sandwich Construction ◽  
Photo Induced Electron Transfer

A glycyrrhizin decorated graphene hybrid materials (GL-G) was synthesized, which is a layer-to-layer sandwich construction. The results of characterization indicate that a photo induced electron transfer process or efficient energy transferring along the GL-G interface. Furthermore, the as-made hybrid material was used as a modifier of the glassy carbon electrode to construct a sensor (GL-G/GCE). Using p-nitrophenol as a model compound, the novel sensor demonstrated a highly enhanced electrochemical activity for it. The peak current of p-nitrophenol was significantly improved at the sensor.

scholarly journals Crystal structure, Hirshfeld surface analysis and spectroscopic characterization of the di-enol tautomeric form of the compound 3,3′-[(2-sulfanylidene-1,3-dithiole-4,5-diyl)bis(sulfanediyl)]bis(pentane-2,4-dione)

2020 ◽  
Vol 76 (9) ◽  
pp. 1427-1432
Author(s):  
Keysha T. Cordero Giménez ◽  
Victoria Y. Soto Díaz ◽  
Jean C. González Espiet ◽  
Alexis Lavín Flores ◽  
Jesbaniris Bas Concepción ◽  
...  
Keyword(s):  
Title Compound ◽  
Tautomeric Form ◽  
Spectroscopic Characterization ◽  
Inversion Center ◽  
Torsion Angles ◽  
Triclinic Space Group ◽  
Covalently Linked ◽  
Intramolecular Hydrogen ◽  
Short Contacts

The reaction between [TBA]2[Zn(dmit)2] and 3-chloro-2,4-pentanedione yielded single crystals of the title compound, (3E,3′E)-3,3′-[(2-sulfanylidene-1,3-dithiole-4,5-diyl)bis(sulfanediyl)]bis(4-hydroxypent-3-en-2-one), C13H14O4S5, after solvent evaporation. The title compound crystallizes in the triclinic space group P\overline{1} with two molecules related by an inversion center present in the unit cell. The central thione ring moiety contains a carbon–carbon double bond covalently linked to two sulfoxide substituents located outside of the plane of the ring. The S—C—C—S torsion angles are −176.18 (8) and −0.54 (18)°. Intramolecular hydrogen bonds occur within the two dione substituents (1.67–1.69 Å). Adjacent asymmetric units are linked by C—H...S (2.89–2.90 Å), S...S [3.569 (1) Å] and O...H [2.56–2.66 Å between non-stacked thione rings] short contacts.

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