scholarly journals Structural Engineering of Luminogens with High Emission Efficiency Both in Solution and in the Solid State

2019 ◽  
Vol 58 (33) ◽  
pp. 11419-11423 ◽  
Author(s):  
Hongwei Wu ◽  
Zhao Chen ◽  
Weijie Chi ◽  
Anivind Kaur Bindra ◽  
Long Gu ◽  
...  
Keyword(s):  
Solid State ◽  
Structural Engineering ◽  
Emission Efficiency ◽  
High Emission

scholarly journals Structural Engineering of Luminogens with High Emission Efficiency both in Solution and in the Solid State

2019 ◽  
Author(s):  
Hongwei Wu ◽  
Zhao Chen ◽  
Weijie Chi ◽  
Anivind Kaur Bindra ◽  
Long Gu ◽  
...  
Keyword(s):  
Solid State ◽  
Structural Engineering ◽  
Emission Efficiency ◽  
High Emission

Fluorescent 5-Alkynyl-2′-Deoxyuridines: High Emission Efficiency of a Conjugated Perylene Nucleoside in a DNA Duplex

ChemBioChem ◽  
2006 ◽  
Vol 7 (5) ◽  
pp. 810-816 ◽  
Author(s):  
Mikhail V. Skorobogatyi ◽  
Andrei D. Malakhov ◽  
Anna A. Pchelintseva ◽  
Alexander A. Turban ◽  
Stanislav L. Bondarev ◽  
...  
Keyword(s):  
Dna Duplex ◽  
Emission Efficiency ◽  
High Emission

scholarly journals Photoluminescence of Silicon Nanocrystals in Silicon Oxide

2007 ◽  
Vol 2007 ◽  
pp. 1-5 ◽  
Author(s):  
L. Ferraioli ◽  
M. Wang ◽  
G. Pucker ◽  
D. Navarro-Urrios ◽  
N. Daldosso ◽  
...  
Keyword(s):  
Layer Thickness ◽  
Silicon Nanocrystals ◽  
Silicon Oxide ◽  
Chemical Vapor ◽  
Fine Tuning ◽  
Emission Efficiency ◽  
Luminescence Efficiency ◽  
Deposition Parameters ◽  
High Emission ◽  
Si Content

Recent results on the photoluminescence properties of silicon nanocrystals embedded in silicon oxide are reviewed and discussed. The attention is focused on Si nanocrystals produced by high-temperature annealing of silicon rich oxide layers deposited by plasma-enhanced chemical vapor deposition. The influence of deposition parameters and layer thickness is analyzed in detail. The nanocrystal size can be roughly controlled by means of Si content and annealing temperature and time. Unfortunately, a technique for independently fine tuning the emission efficiency and the size is still lacking; thus, only middle size nanocrystals have high emission efficiency. Interestingly, the layer thickness affects the nucleation and growth kinetics so changing the luminescence efficiency.

scholarly journals Two Luminescent Iridium Complexes with Phosphorous Ligands and Their Photophysical Comparison in Solution, Solid and Electrospun Fibers: Decreased Aggregation-Caused Emission Quenching by Steric Hindrance

Materials ◽  
2021 ◽  
Vol 14 (18) ◽  
pp. 5419
Author(s):  
Chaohui Huang ◽  
Bin Li
Keyword(s):  
Excited State ◽  
Solid State ◽  
Steric Hindrance ◽  
Density Functional ◽  
Density Functional Theory Calculation ◽  
Electrospun Fibers ◽  
Iridium Complexes ◽  
Ligand Charge Transfer ◽  
High Emission ◽  
Emission Quenching

In this paper, we prepared two phosphorescent Ir complexes with ligands of 2-phenyl pyridine (ppy), and two phosphorous ligands with large steric hindrance, hoping to allow enough time for the transformation of the highly phosphorescent 3MLLCT (metal-to-ligand-ligand-charge-transfer) excited state. Their large steric hindrance minimized the π-π interaction between complex molecules, so that the aggregation-induced phosphorescence emission (AIPE) influence could be minimized. Their single crystals indicated that they took a distorted octahedral coordination mode. Photophysical comparison between these Ir complexes in solution, in the solid state and in electrospun fibers was performed to confirm the realization of limited aggregation-caused quenching (ACQ). The potential surface crossing and energy transfer from 3MLBPECT/3MLBPELppyCT to 3MLppyCT in these Ir complexes were revealed by density functional theory calculation and temperature-dependent emission. It was confirmed that these two phosphorous ligands offered large steric hindrance, which decreased the ACQ effect, allowing the efficient emissive decay of the 3MLppyCT excited state. This is one of the several luminescent Ir complexes with a high emission yield (Φ = 0.27) and long emission lifetime (0.43 μs) in the solid state.

Anionic cyclometallated Pt(ii) square-planar complexes: new sets of highly luminescent compounds

2017 ◽  
Vol 46 (37) ◽  
pp. 12625-12635 ◽  
Author(s):  
Loredana Ricciardi ◽  
Massimo La Deda ◽  
Andreea Ionescu ◽  
Nicolas Godbert ◽  
Iolinda Aiello ◽  
...  
Keyword(s):  
Solid State ◽  
Emission Efficiency ◽  
Square Planar ◽  
Square Planar Complexes

Novel anionic Pt(ii) complexes were synthesized, displaying an outstanding enhancement of the emission efficiency in the solid state.

Silica covering driven intensity enhancement and handedness inversion of the CPL signals of the supramolecular assemblies

2021 ◽  
Author(s):  
Pan Jiang ◽  
Hongkun Li ◽  
Wei Liu ◽  
Yi Li ◽  
baozong Li ◽  
...  
Keyword(s):  
Supramolecular Assemblies ◽  
Sodium Salts ◽  
Intensity Enhancement ◽  
Emission Efficiency ◽  
High Emission

A pair of Phe-Phe dipeptides with a tolane group were synthesized by introducing tolane with high emission efficiency to phenylalanine dipeptide. The sodium salts of the dipeptides were able to...

Manipulation of the Electronic and Structural Effects on the Solid-State Emission of Multiple Linked Anthracenyl-o-Carborane Dyads

2021 ◽  
Author(s):  
Yongdong Ma ◽  
Xueyan Wu ◽  
Yan Lv ◽  
Xiaoping Jin ◽  
Huici Shan ◽  
...  
Keyword(s):  
Solid State ◽  
Structural Effects ◽  
Emission Efficiency ◽  
State Luminescence

A direct boost the emission efficiency is presented based on the strategy of link multiple weak AIE-active anthracenyl-o-carborane dyad together for improving solid-state luminescence. Multiple anthracenyl-o-carborane dyad, linked with benzyl...

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