scholarly journals The Solid-State Emission of Bilirubin

2020 ◽  
Author(s):  
Ahmed El-Zohry ◽  
Taha Ahmed ◽  
Burkhard Zietz
Keyword(s):  
Solid State ◽  
Quantum Yield ◽  
Room Temperature ◽  
Crystal Quality ◽  
Biological Sensors ◽  
Frenkel Exciton ◽  
Aggregation Induced Emission ◽  
Isomerization Process ◽  
Emission Lifetime

<p>Bilirubin (BR) is a human-biological compound formed during the haem metabolism that is insoluble in most solvents. BR has shown short emission lifetime with low quantum yield in limited number of solvents, due to the non-radiative ultrafast isomerization process. However, in solid-state, red-shifted emission of long-lived species of BR are detected at room temperature, due to the aggregation-induced emission formed by Frenkel exciton of J-system. This solid-state emission of BR depends on the crystal quality of BR as shown by SEM and XRD. This study allows for better understandings of the photophysics of BR in solid-state, opening opportunities for its applications in luminescent biological sensors. </p>

scholarly journals The Solid-State Emission of Bilirubin

2020 ◽  
Author(s):  
Ahmed El-Zohry ◽  
Taha Ahmed ◽  
Burkhard Zietz
Keyword(s):  
Solid State ◽  
Quantum Yield ◽  
Room Temperature ◽  
Crystal Quality ◽  
Biological Sensors ◽  
Frenkel Exciton ◽  
Aggregation Induced Emission ◽  
Isomerization Process ◽  
Emission Lifetime

<p>Bilirubin (BR) is a human-biological compound formed during the haem metabolism that is insoluble in most solvents. BR has shown short emission lifetime with low quantum yield in limited number of solvents, due to the non-radiative ultrafast isomerization process. However, in solid-state, red-shifted emission of long-lived species of BR are detected at room temperature, due to the aggregation-induced emission formed by Frenkel exciton of J-system. This solid-state emission of BR depends on the crystal quality of BR as shown by SEM and XRD. This study allows for better understandings of the photophysics of BR in solid-state, opening opportunities for its applications in luminescent biological sensors. </p>

Solid-state thiolate-stabilized copper nanoclusters with ultrahigh photoluminescence quantum yield for white light-emitting devices

Nanoscale ◽  
2020 ◽  
Vol 12 (29) ◽  
pp. 15791-15799 ◽  
Author(s):  
Hao-Hua Deng ◽  
Qiong-Qiong Zhuang ◽  
Kai-Yuan Huang ◽  
Paramasivam Balasubramanian ◽  
Zhen Lin ◽  
...  
Keyword(s):  
Solid State ◽  
Quantum Yield ◽  
White Light ◽  
Copper Nanoclusters ◽  
Light Emitting ◽  
Aggregation Induced Emission ◽  
Emission Properties ◽  
Light Emitting Devices ◽  
Photoluminescence Quantum Yield

White-light-emitting devices are successfully fabricated by using solid-state copper nanoclusters as the sole phosphors with aggregation-induced emission properties.

Similar and Different: Effect of Substitution Pattern on the Aggregation-Induced Emission Property of [4'-(bisphenylamino)[1,1']biphenyl]methylene Fluorenes

2013 ◽  
Vol 859 ◽  
pp. 329-332
Author(s):  
Zhi Chen ◽  
Yi Long Xie ◽  
Jin Xing Qiu ◽  
Zhong He Chen
Keyword(s):  
Solid State ◽  
Optical Property ◽  
Quantum Yield ◽  
Suzuki Coupling ◽  
Emission Property ◽  
Aggregate State ◽  
Substitution Pattern ◽  
Aggregation Induced Emission ◽  
Emission Behavior ◽  
Fluorescent Quantum Yield

Three isomers, [4'-(bisphenylamino)[1,1']biphen-2-yl]methylenefluorene (BAB2MF), [4'-(bisphenylamino)[1,1']biphen-3-yl]methylenefluorene (BAB3MF) and [4'-(bisphenylamino)[1,1']biphen-4-yl]methylenefluorene (BAB4MF), were synthesized through Suzuki coupling. The substitution pattern exerts a dramatic influence on the optical property. BAB3MF and BAB4MF are hardly emissive either in the solution or as solid state. On the contrary, BAB2MF emits strongly, especially in the aggregate state with a high fluorescent quantum yield of 69%. Furthermore, BAB2MF shows an aggregation-induced enhanced emission behavior. BAB2MF solid emits at 488 nm, about 60 nm blue-shifted from its solution.

scholarly journals Solid-State Highly Efficient DR Mono and Poly-Dicyano-Phenylenevinylene Fluorophores

2018 ◽  
Author(s):  
Barbara Panunzi ◽  
Rosita Diana ◽  
Simona Concilio ◽  
Lucia Sessa ◽  
Rafi Shikler ◽  
...  
Keyword(s):  
Solid State ◽  
Quantum Yield ◽  
Fluorescence Quantum Yield ◽  
Spectroscopic Properties ◽  
Crystallographic Data ◽  
Time Dependent ◽  
Aggregation Induced Emission ◽  
Solid Films ◽  
Highly Efficient ◽  
Organic Solid

A highly efficient deep red (DR) emitting organic solid based on a dicyano-phenylenevinylene derivative was reported. The structural and spectroscopic properties of the solid have been described in terms of crystallographic data and time dependent DFT analysis. A noteworthy fluorescence quantum yield of 53% was observed for the brightest emitter cast into solid films. This result can be explained in terms of aggregation-induced emission (AIE) effect.

Aggregation-induced emission based on a fluorinated macrocycle: visualizing spontaneous and ultrafast solid-state molecular motions at room temperature via F⋯F interactions

2020 ◽  
Vol 8 (42) ◽  
pp. 14919-14924
Author(s):  
Mei Zhang ◽  
Jingjing Guo ◽  
Tingting Liu ◽  
Zhanyu He ◽  
Majeed Irfan ◽  
...  
Keyword(s):  
Solid State ◽  
Room Temperature ◽  
Molecular Motions ◽  
Aggregation Induced Emission

We report the first example of fluorinated macrocycle, where two adjacent 6F-2 macrocycles were linked by two C–F⋯F–C halogen interactions, which endowed the molecule with autonomous and rapid MFC reversibility, within 100 s, at room temperature.

Improved Sol-Gel Materials for Efficient Solid State Dye Lasers

1993 ◽  
Vol 329 ◽  
Author(s):  
Michael Canva ◽  
Patrick Georges ◽  
Jean-Fran^ois Perelgritz ◽  
Alain Brun ◽  
Fréddric Chaput ◽  
...  
Keyword(s):  
Solid State ◽  
Physical Properties ◽  
Room Temperature ◽  
Sol Gel ◽  
Tunable Lasers ◽  
Optical Quality ◽  
Dye Lasers ◽  
Laser Dyes ◽  
Host Matrix ◽  
Host Matrices

AbstractPhotoresistant laser dyes were trapped in silica based xerogel host matrices to obtain solid state tunable lasers. For this purpose very dense xerogel samples with improved chemical and physical properties were prepared at room temperature by the sol-gel technology. The as-prepared materials were polished to obtain optical quality surfaces and were used as new lasing media.Lasing action of such different dyes as rhodamine, perylene and pyrromethene doping dense sol-gel matrices was demonstrated. Efficiencies of 30 % or lifetimes of more than 100,000 shots were achieved with different new ≤dye dopant/host matrix≥ couples. Their different performances are reviewed and discussed.

Imidazole Promoted Efficient Anomerization of β-D-Glucose Pentaacetate in Organic Solutions and Solid State

2019 ◽  
Author(s):  
Meifeng Wang ◽  
Liyin Zhang ◽  
Yiqun Li ◽  
Liuqun Gu
Keyword(s):  
Solid State ◽  
Organic Solvents ◽  
Room Temperature ◽  
Materials Design ◽  
The Future ◽  
Organic Solutions ◽  
Glucose Pentaacetate

<p></p>Anomerization of glycosides were rarely performed under basic condition due to lack of efficiency. Here an imidazole promoted anomerization of β-D-glucose pentaacetate was developed; and reaction could proceed in both organic solvents and solid state at room temperature. Although mechanism is not yet clear, this unprecedent mild anomerization in solid state may open a new promising way for stereoseletive anomerization of broad glucosides and materials design in the future..

THE STUDY ON TA VAT WINE PRODUCTION FROM SUGAR PALM (ARENGA PINNATA) SAP

2014 ◽  
Vol 83 (5) ◽  
Author(s):  
Nguyễn Thị Hồng Thu ◽  
Đặng Minh Nhật ◽  
Nguyễn Hoàng Dung
Keyword(s):  
Room Temperature ◽  
Fermentation Process ◽  
Inoculum Size ◽  
Wine Fermentation ◽  
Wine Production ◽  
Factors Affecting ◽  
Natural Fermentation ◽  
Tropical Asia ◽  
Best Parameters

Sugar palm (Arenga pinnata) is a feather palm native to tropical Asia. In Vietnam, it is named Búng Báng or Đoác and grown only on the highlands in the central or northern part of Vietnam. It is utilized for many purposes, especially for Ta Vat wine production - a characteristic and unique product of Co Tu ethnic minority. However, because of the natural fermentation used in the production, the product quality is inconsistent. The purpose of this study was to examine a new procedure of using palm sap for making Ta Vat wine. Some characteristics of the sap, which was collected at Nam Giang district, Quang Nam province are determined, proving the potential of the sap for making wine product. The quality of sap changes quickly at room temperature. At low temperature (4 - 60C), the changes in sap quality are apparently slower. Examining some factors affecting its quality during the wine fermentation process, we determined the best parameters for the fermentation process as follows: inoculum size of 3% with cell density of about 1x108 cells/ml, the addition of the extract from the bark of Ceylon ironwood (Mesua ferrea L.) 4%. Keywords: Arenga pinnata, sap, Ceylon ironwood bark, Mesua ferrea L., wine fermentation.

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