Cyano-substituted oligo(p-phenylene-vinylene)s having linear and branched octyloxy groups: control of aggregation and emitting properties via C8 alkyl chain difference

2021 ◽  
Author(s):  
Shotaro Hayashi
Keyword(s):  
Solid State ◽  
Alkyl Chain ◽  
Knoevenagel Condensation ◽  
Phenylene Vinylene ◽  
Emission Properties

We report control of solid-state emission properties of cyano-substituted oligo(p-phenylene-vinylene)s, COPVs, via C8 alkyl chain. COPVs having C8H17O-, n-octyloxy and 2-ethylhexyloxy, groups were synthesized by Knoevenagel condensation. The alkyl (alkoxy)...

scholarly journals Switching-On Fluorescence by Copper (II) and Basic Anions: A Case Study with a Pyrene-Functionalized Squaramide

Molecules ◽  
2021 ◽  
Vol 26 (5) ◽  
pp. 1301
Author(s):  
Giacomo Picci ◽  
Jessica Milia ◽  
Maria Carla Aragoni ◽  
Massimiliano Arca ◽  
Simon J. Coles ◽  
...  
Keyword(s):  
Solid State ◽  
Copper Complex ◽  
Receptor Complex ◽  
Emission Properties ◽  
Naked Eye ◽  
Intense Emission ◽  
Uv Lamp

The new symmetric acyclic N,N’-bis(1-pyrenyl) squaramide (H2L) functionalized with the pyrene moiety as a fluorogenic fragment has been designed and its ability to selectively detect specific anions and metals investigated. H2L selectively binds Cl− both in solution (DMSO 0.5% H2O and MeCN) and in the solid state, and allows to selectively detect Cu2+ in MeCN with the formation of a 2:1 metal-receptor complex, with a green intense emission appreciable by naked eye under the UV lamp. The H2L copper complex preserves its emission properties in the presence of Cl−. The addition of basic anions (OH−, CN−, and F−) up to 10 equivalents caused the deprotonation of the squaramide NHs and a dramatic change of the emission properties of the H2L copper complex.

Investigation of the basis of catalytic activity of solid state phosphate complexes in the Knoevenagel condensation

2003 ◽  
Vol 202 (1-2) ◽  
pp. 247-252 ◽  
Author(s):  
Jamal Bennazha ◽  
Mohamed Zahouilly ◽  
Ali Boukhari ◽  
Elizabeth M Holt
Keyword(s):  
Catalytic Activity ◽  
Solid State ◽  
Knoevenagel Condensation

scholarly journals Nitrile-Substituted 2-(Oxazolinyl)-Phenols: Minimalistic Excited-State Intramolecular Proton Transfer (ESIPT)-Based Fluorophores

2020 ◽  
Author(s):  
Dominik Göbel ◽  
Daniel Duvinage ◽  
Tim Stauch ◽  
Boris Nachtsheim
Keyword(s):  
Excited State ◽  
Solid State ◽  
Proton Transfer ◽  
Density Functional ◽  
Intramolecular Proton Transfer ◽  
Crystal Structure Analysis ◽  
Quantum Yields ◽  
Functional Theory ◽  
Emission Properties ◽  
Emission Enhancement

Herein, we present minimalistic single-benzene, excited-state intramolecular proton transfer (ESIPT) based fluorophores as powerful solid state emitters. The very simple synthesis gave access to all four regioisomers of nitrile-substituted 2(oxazolinyl)phenols (MW = 216.1). In respect of their emission properties they can be divided into aggregation-induced emission enhancement (AIEE) luminophores (1-CN and 2-CN), dual state emission (DSE) emitters (3-CN) and aggregation-caused quenching (ACQ) fluorophores (4‐CN). Remarkably, with compound 1-CN we discovered a minimalistic ESIPT based fluorophore with extremely high quantum yield in the solid state ΦF = 87.3% at λem = 491 nm. Furthermore, quantum yields in solution were determined up to ΦF = 63.0%, combined with Stokes shifts up till 11.300 cm–1. Temperature dependent emission mapping, crystal structure analysis and time-dependent density functional theory (TDDFT) calculations gave deep insight into the origin of the emission properties.<br>

scholarly journals Conjugates of tetraphenylethene and diketopyrrolopyrrole: tuning the emission properties with phenyl bridges

2014 ◽  
Vol 50 (63) ◽  
pp. 8747-8750 ◽  
Author(s):  
Xiao Yuan Shen ◽  
Yi Jia Wang ◽  
Haoke Zhang ◽  
Anjun Qin ◽  
Jing Zhi Sun ◽  
...  
Keyword(s):  
Solid State ◽  
Emission Properties

Bridging DPP (ACQ-gen) and TPE (AIE-gen) with phenyls derived TPE–ph–DPP conjugates displaying enhanced and red-shifted emission in the solid state.

Water-sulfate anion interplay in the evolution of solid state architectures and emission properties of Zn and Cd coordination networks with four azine ligands

2020 ◽  
Vol 286 ◽  
pp. 121312 ◽  
Author(s):  
Vasile Lozovan ◽  
Victor Ch. Kravtsov ◽  
Eduard B. Coropceanu ◽  
Anatolii V. Siminel ◽  
Olga V. Kulikova ◽  
...  
Keyword(s):  
Solid State ◽  
Coordination Networks ◽  
Sulfate Anion ◽  
Emission Properties

Photo and Electroluminescent Properties of a Porphyrin-Poly(p-Phenylene Vinylene) Derivative

1999 ◽  
Vol 598 ◽  
Author(s):  
J. Morgado ◽  
R. Iqbal ◽  
G. Yahioglu ◽  
L. R. Milgrom ◽  
S. C. Moratti ◽  
...  
Keyword(s):  
Energy Transfer ◽  
Solid State ◽  
Emission Spectra ◽  
Luminescent Properties ◽  
Phenylene Vinylene ◽  
Efficient Energy Transfer ◽  
Light Emitting ◽  
Efficient Energy ◽  
Small Absorption ◽  
Pl Emission

ABSTRACTThe solid state luminescent properties of new statistical copolymers of 2-methoxy-5-(2'-ethylhexyloxy)-1,4-phenylene vinylene and a porphyrin-substituted phenylene vinylene are reported. The photoluminescence, PL, emission shows an efficient energy transfer to the porphyrin, in spite of the small absorption coefficient of the porphyrin in the wavelength range of the poly [2-methoxy-5-(2'- ethylhexyloxy)-1,4-phenylene vinylene], MEH-PPV, emission. At a porphyrin content of 0.25%, by weight, the emission is already dominated by the porphyrin. The PL efficiency of these copolymers is significantly reduced from the value of 13% for MEH-PPV down to 3% for the copolymer with 10.84% of porphyrin. Efficient energy transfer is also observed in the emission spectra of light-emitting diodes.

Synthesis and aggregation properties of a series of dumbbell polyhedral oligosilsesquioxane-perylene diimide triads

CrystEngComm ◽  
2015 ◽  
Vol 17 (6) ◽  
pp. 1453-1463 ◽  
Author(s):  
Ying Zhang ◽  
Liangliang Zhang ◽  
Heyuan Liu ◽  
Di Sun ◽  
Xiyou Li
Keyword(s):  
Solid State ◽  
Perylene Diimide ◽  
Emission Properties ◽  
Polyhedral Oligosilsesquioxane

A series of perylenetetracarboxylic diimide compounds connected with POSS groups have been synthesized and their solid state emission properties are investigated.

Miscibility of poly(para-phenylene vinylene) model compounds with PMMA studied by solid-state NMR

1992 ◽  
Vol 47 (2) ◽  
pp. 239-253 ◽  
Author(s):  
J. Nouwen ◽  
P. Adriaensens ◽  
D. Franco ◽  
D. Vanderzande ◽  
H. Martens ◽  
...  
Keyword(s):  
Solid State ◽  
Solid State Nmr ◽  
Phenylene Vinylene ◽  
Model Compounds
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