Long-Living Emitting Electrochemical Cells Based on Supramolecular π-π Interactions

2009 ◽  
Vol 1197 ◽  
Author(s):  
Rubén D. Costa ◽  
Enrique Ortí ◽  
Stefan Graber ◽  
Markus Neuburger ◽  
Catherine E. Hausecroft ◽  
...  
Keyword(s):  
Electrochemical Cells ◽  
Stacking Interactions ◽  
Light Emitting ◽  
Stacking Interaction ◽  
Face To Face ◽  
Π Interactions ◽  
Π Stacking ◽  
Π Stacking Interaction

AbstractThe complex [Ir(ppy)2(dpbpy)][PF6] (Hppy = 2-phenylpyridine, dpbpy = 6,6'-diphenyl-2,2'-bipyridine) has been prepared and evaluated as an electroluminescent component for light-emitting electrochemical cells (LECs). The complex exhibits two intramolecular face-to-face π-stacking interactions and long-lived LECs have been constructed; the device characteristics are not significantly improved in comparison to analogous LECs with 6-phenyl-2,2'-bipyridine with only one π-stacking interaction.

The intramolecular π–π stacking interaction does not always work for improving the stabilities of light-emitting electrochemical cells

2012 ◽  
Vol 13 (11) ◽  
pp. 2442-2449 ◽  
Author(s):  
Fuli Zhang ◽  
Lian Duan ◽  
Juan Qiao ◽  
Guifang Dong ◽  
Liduo Wang ◽  
...  
Keyword(s):  
Electrochemical Cells ◽  
Light Emitting ◽  
Stacking Interaction ◽  
Π Stacking ◽  
Π Stacking Interaction

scholarly journals The Face-to-Face σ-Hole···σ-Hole Stacking Interactions: Structures, Energies, and Nature

Crystals ◽  
2021 ◽  
Vol 11 (8) ◽  
pp. 877
Author(s):  
Yu Zhang ◽  
Weizhou Wang
Keyword(s):  
Quantum Chemical ◽  
Noncovalent Interactions ◽  
Electrostatic Energy ◽  
Stacking Interactions ◽  
Energy Component ◽  
Stacking Interaction ◽  
Face To Face ◽  
The Face ◽  
Π Stacking Interaction ◽  
Induction Energy

The existence of the π···π stacking interaction is well-known. Similarly, it is reasonable to assume the existence of the σ-hole···σ-hole stacking interaction. In this work, the structures, energies, and nature of the face-to-face σ-hole···σ-hole stacking interactions in the crystal structures have been investigated in detail by the quantum chemical calculations. The calculated results clearly show that the face-to-face σ-hole···σ-hole stacking interactions exist and have unique properties, although their strengths are not very significant. The energy component analysis reveals that, unlike many other dispersion-dominated noncovalent interactions in which the induction energies always play minor roles for their stabilities, for the face-to-face σ-hole···σ-hole stacking interaction the contribution of the induction energy to the total attractive energy is close to or even larger than that of the electrostatic energy. The structures, energies, and nature of the face-to-face σ-hole···σ-hole stacking interactions confined in small spaces have also been theoretically simulated. One of the important findings is that encapsulation of the complex bound by the face-to-face σ-hole···σ-hole stacking interaction can tune the electronic properties of the container.

scholarly journals Isomers and polymorphs of (E,E)-1,4-bis(nitrophenyl)-2,3-diaza-1,3-butadienes

2006 ◽  
Vol 62 (4) ◽  
pp. 666-675 ◽  
Author(s):  
Christopher Glidewell ◽  
John N. Low ◽  
Janet M. S. Skakle ◽  
James L. Wardell
Keyword(s):  
Hydrogen Bond ◽  
Hydrogen Bonds ◽  
Three Dimensional ◽  
Stacking Interactions ◽  
Space Group ◽  
Stacking Interaction ◽  
Space Groups ◽  
Π Stacking ◽  
Π Stacking Interaction ◽  
Polymorphic Forms

The structures of five of the possible six isomers of (E,E)-1,4-bis(nitrophenyl)-2,3-diaza-1,3-butadiene are reported, including two polymorphs of one of the isomers. (E,E)-1,4-Bis(2-nitrophenyl)-2,3-diaza-1,3-butadiene, C14H10N4O4 (I), crystallizes in two polymorphic forms (Ia) and (Ib) in which the molecules lie across centres of inversion in space groups P21/n and P21/c, respectively: the molecules in (Ia) and (Ib) are linked into chains by aromatic π...π stacking interactions and C—H...π(arene) hydrogen bonds, respectively. Molecules of (E,E)-1-(2-nitrophenyl)-4-(3-nitrophenyl)-2,3-diaza-1,3-butadiene (II) are linked into sheets by two independent C—H...O hydrogen bonds. The molecules of (E,E)-1,4-bis(3-nitrophenyl)-2,3-diaza-1,3-butadiene (III) lie across inversion centres in the space group P21/n, and a combination of a C—H...O hydrogen bond and a π...π stacking interaction links the molecules into sheets. A total of four independent C—H...O hydrogen bonds link the molecules of (E,E)-1-(3-nitrophenyl)-4-(4-nitrophenyl)-2,3-diaza-1,3-butadiene (IV) into sheets. In (E,E)-1,4-bis(4-nitrophenyl)-2,3-diaza-1,3-butadiene (V) the molecules, which lie across centres of inversion in the space group P21/n, are linked by just two independent C—H...O hydrogen bonds into a three-dimensional framework.

Suppressing π–π stacking interactions for enhanced solid-state emission of flat aromatic molecules via edge functionalization with picket-fence-type groups

2020 ◽  
Vol 8 (48) ◽  
pp. 17289-17296
Author(s):  
Hye Jin Cho ◽  
Sang Won Kim ◽  
Sungjin Kim ◽  
Sangback Lee ◽  
Juhyen Lee ◽  
...  
Keyword(s):  
Solid State ◽  
Light Emitting Diodes ◽  
Organic Light Emitting Diodes ◽  
Stacking Interactions ◽  
Light Emitting ◽  
Aromatic Molecules ◽  
Organic Light ◽  
Π Stacking ◽  
Picket Fence ◽  
Π Stacking Interaction

Picket-fence-type substituents effectively suppress the π–π stacking interaction of flat aromatic molecules and enhance solid-state emission for application in organic light-emitting diodes.

scholarly journals Exceptionally long-lived light-emitting electrochemical cells: multiple intra-cation π-stacking interactions in [Ir(C^N)2(N^N)][PF6] emitters

2015 ◽  
Vol 6 (5) ◽  
pp. 2843-2852 ◽  
Author(s):  
Andreas M. Bünzli ◽  
Edwin C. Constable ◽  
Catherine E. Housecroft ◽  
Alessandro Prescimone ◽  
Jennifer A. Zampese ◽  
...  
Keyword(s):  
Electrochemical Cells ◽  
Stacking Interactions ◽  
Light Emitting ◽  
Π Stacking

Extremely long-lived LEC devices have been achieved using [Ir(C^N)2(bpy)]+ complexes with phenyl-substituted C^N ligands.

scholarly journals Cooperative spin-crossover transition from three-dimensional purely π-stacking interactions in a neutral heteroleptic azobisphenolate FeIII complex with a N3O3 coordination sphere

2017 ◽  
Vol 46 (18) ◽  
pp. 5786-5789 ◽  
Author(s):  
Suguru Murata ◽  
Kazuyuki Takahashi ◽  
Tomoyuki Mochida ◽  
Takahiro Sakurai ◽  
Hitoshi Ohta ◽  
...  
Keyword(s):  
Coordination Sphere ◽  
Spin Crossover ◽  
Three Dimensional ◽  
Interaction Network ◽  
Stacking Interactions ◽  
Stacking Interaction ◽  
Π Stacking ◽  
Π Stacking Interaction ◽  
Crossover Transition ◽  
Cooperative Transition

The first neutral spin-crossover FeIII complex with a N3O3 coordination sphere formed a purely π-stacking interaction network and exhibited the cooperative transition.

scholarly journals Experimental and theoretical insights in the alkene–arene intramolecular π-stacking interaction

2016 ◽  
Vol 12 ◽  
pp. 1616-1623 ◽  
Author(s):  
Valeria Corne ◽  
Ariel M Sarotti ◽  
Carmen Ramirez de Arellano ◽  
Rolando A Spanevello ◽  
Alejandra G Suárez
Keyword(s):  
Electron Density ◽  
Quantum Chemical Calculations ◽  
Quantum Chemical ◽  
Stacking Interactions ◽  
Nmr Studies ◽  
Stacking Interaction ◽  
Π Stacking ◽  
Acrylic Esters ◽  
Π Stacking Interaction

Chiral acrylic esters derived from biomass were developed as models to have a better insight in the aryl–vinyl π-stacking interactions. Quantum chemical calculations, NMR studies and experimental evidences demonstrated the presence of equilibriums of at least four different conformations: π-stacked and face-to-edge, each of them in an s-cis/s-trans conformation. The results show that the stabilization produced by the π–π interaction makes the π-stacked conformation predominant in solution and this stabilization is slightly affected by the electron density of the aromatic counterpart.

Hydrogen-bonded sheet structures in methyl 4-(4-chloroanilino)-3-nitrobenzoate and methyl 1-benzyl-2-(4-chlorophenyl)-1H-benzimidazole-5-carboxylate

2012 ◽  
Vol 69 (1) ◽  
pp. 77-81
Author(s):  
Edwar Cortés ◽  
Rodrigo Abonía ◽  
Justo Cobo ◽  
Christopher Glidewell
Keyword(s):  
Hydrogen Bond ◽  
Hydrogen Bonds ◽  
Stacking Interactions ◽  
Electronic Polarization ◽  
Stacking Interaction ◽  
Π Stacking ◽  
Π Stacking Interaction ◽  
Hydrogen Bonded

In methyl 4-(4-chloroanilino)-3-nitrobenzoate, C14H11ClN2O4, (I), there is an intramolecular N—H...O hydrogen bond and the intramolecular distances provide evidence for electronic polarization of theo-quinonoid type. The molecules are linked into sheets built from N—H...O, C—H...O and C—H...π(arene) hydrogen bonds, together with an aromatic π–π stacking interaction. The molecules of methyl 1-benzyl-2-(4-chlorophenyl)-1H-benzimidazole-5-carboxylate, C22H17ClN2O2, (II), are also linked into sheets, this time by a combination of C—H...π(arene) hydrogen bonds and aromatic π–π stacking interactions.

scholarly journals Isomeric N-(iodophenyl)nitrophthalimides: interplay of C—H...O hydrogen bonds, iodo...nitro and iodo...carbonyl interactions, and aromatic π...π stacking interactions

2005 ◽  
Vol 61 (2) ◽  
pp. 227-237 ◽  
Author(s):  
Christopher Glidewell ◽  
John N. Low ◽  
Janet M. S. Skakle ◽  
Solange M. S. V. Wardell ◽  
James L. Wardell
Keyword(s):  
Hydrogen Bond ◽  
Hydrogen Bonds ◽  
Three Dimensional ◽  
Supramolecular Structures ◽  
Stacking Interactions ◽  
Stacking Interaction ◽  
Π Stacking ◽  
Π Stacking Interaction

The six isomeric N-(iodophenyl)nitrophthalimides, C14H7IN2O4, have been synthesized and the structures of five of them are reported. In N-(4-iodophenyl)-4-nitrophthalimide [(I), orthorhombic P212121] the molecules are linked into sheets by a combination of four independent C—H...O hydrogen bonds, but I...O interactions are absent. The isomers N-(3-iodophenyl)-4-nitrophthalimide [(II), monoclinic P21/c] and N-(2-iodophenyl)-4-nitrophthalimide [(III), monoclinic P21/n] both form sheets, but in (II) the molecules are linked by a combination of one two-centre iodo...nitro interaction and one C—H...O hydrogen bond into sheets containing R_4^4(30) rings, while in (III) they are linked by an iodo...carbonyl interaction and a C—H...O hydrogen bond into sheets or R_4^4(26) rings. Three-dimensional supramolecular structures are formed in both N-(4-iodophenyl)-3-nitrophthalimide [(IV), monoclinic P21/n] and N-(3-iodophenyl)-3-nitrophthalimide [(V), orthorhombic, P212121]. In (IV) the molecules are linked by a three-centre iodo...nitro interaction, three C—H...O hydrogen bonds and an aromatic π...π stacking interaction, but the framework in (V) is generated by a two-centre iodo...nitro interaction and only two C—H...O hydrogen bonds: aromatic π...π stacking interactions are absent from (V).

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