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.

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.

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.

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 Synthesis, crystal structure and photophysical properties of chlorido[2-(2′,6′-difluoro-2,3′-bipyridin-6-yl-κN 1)-6-(pyridin-2-yloxy-κN)phenyl-κC 1]platinum(II)

2021 ◽  
Vol 77 (2) ◽  
pp. 107-110
Author(s):  
Ki-Min Park ◽  
Cheol Joo Moon ◽  
Sanghyun Paek ◽  
Youngjin Kang
Keyword(s):  
Title Compound ◽  
Light Emitting Diode ◽  
Photophysical Properties ◽  
Three Dimensional ◽  
Visible Region ◽  
Supramolecular Network ◽  
Stacking Interactions ◽  
Light Emitting ◽  
Organic Light Emitting Diode ◽  
Π Stacking

The title compound, [Pt(C21H12F2N3O)Cl], crystallizes with two crystallographically independent molecules (A and B) in the asymmetric unit, which adopt similar conformations. The PtII atoms in both molecules adopt distorted square-planar geometries, coordinated by one C and two N atoms from the tridentate 2′,6′-difluoro-6-[3-(pyridin-2-yloxy)phenyl]-2,3′-bipyridine ligand and a chloride anion: the C and Cl atoms are trans. In the crystal, C—H...Cl/F hydrogen bonds, F...π and weak π–π stacking interactions between adjacent A and B molecules and between pairs of inversion-related B molecules lead to the formation of a two-dimensional supramolecular network lying parallel to the ab plane. The sheets are stacked along the c-axis direction and linked by F...π and weak π–π stacking interactions between pairs of inversion-related A molecules, forming a three-dimensional supramolecular network. The photoluminescence quantum efficiency of the title compound in the blue–green region of the visible region (λmax = 517 and 544 nm) is estimated to be ∼0.2–0.3, indicating that the title compound could be a suitable candidate as the emitting material in organic light-emitting diode (OLED) applications.

Intramolecular π-Stacking in a Phenylpyrazole-Based Iridium Complex and Its Use in Light-Emitting Electrochemical Cells

2010 ◽  
Vol 132 (17) ◽  
pp. 5978-5980 ◽  
Author(s):  
Rubén D. Costa ◽  
Enrique Ortí ◽  
Henk J. Bolink ◽  
Stefan Graber ◽  
Catherine E. Housecroft ◽  
...  
Keyword(s):  
Iridium Complex ◽  
Electrochemical Cells ◽  
Light Emitting ◽  
Π Stacking

Single Molecule Solid State Light Emitting Electrochemical Cells with Lifetimes Superior to 3000 Hours

2008 ◽  
Author(s):  
Henk Bolink ◽  
Rubén D. Costa ◽  
Enrique Orti ◽  
Michele Sessolo ◽  
Stefan Graber ◽  
...  
Keyword(s):  
Solid State ◽  
Single Molecule ◽  
Electrochemical Cells ◽  
Light Emitting

Self-Recognizing π-π Stacking Interactions Designed for the Generation of Ultrastable Mesoporous Hydrogen-Bonded Organic Frameworks

2019 ◽  
Author(s):  
KAIKAI MA ◽  
Peng Li ◽  
John Xin ◽  
Yongwei Chen ◽  
Zhijie Chen ◽  
...  
Keyword(s):  
Pore Size ◽  
Fiber Composite ◽  
Aqueous Media ◽  
Stacking Interactions ◽  
Mustard Gas ◽  
X Ray Diffraction ◽  
X Ray ◽  
Expansion Strategy ◽  
Π Stacking ◽  
Hydrogen Bonded

Creating crystalline porous materials with large pores is typically challenging due to undesired interpen-etration, staggered stacking, or weakened framework stability. Here, we report a pore size expansion strategy by self-recognizing π-π stacking interactions in a series of two-dimensional (2D) hydrogen–bonded organic frameworks (HOFs), HOF-10x (x=0,1,2), self-assembled from pyrene-based tectons with systematic elongation of π-conjugated molecular arms. This strategy successfully avoids interpene-tration or staggered stacking and expands the pore size of HOF materials to access mesoporous HOF-102, which features a surface area of ~ 2,500 m2/g and the largest pore volume (1.3 cm3/g) to date among all reported HOFs. More importantly, HOF-102 shows significantly enhanced thermal and chemical stability as evidenced by powder x-ray diffraction and N2 isotherms after treatments in chal-lenging conditions. Such stability enables the adsorption of dyes and cytochrome c from aqueous media by HOF-102 and affords a processible HOF-102/fiber composite for the efficient photochemical detox-ification of a mustard gas simulant.

A versatile structure of light-emitting electrochemical cells for printed electronics

2020 ◽  
Vol 13 (8) ◽  
pp. 084002
Author(s):  
Yuki Tanaka ◽  
Jiang Pu ◽  
Taishi Takenobu
Keyword(s):  
Printed Electronics ◽  
Electrochemical Cells ◽  
Light Emitting
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