scholarly journals Triboluminescence of Centrosymmetric Lanthanide β-Diketonate Complexes with Aggregation-Induced Emission

Molecules ◽  
2019 ◽  
Vol 24 (4) ◽  
pp. 662 ◽  
Author(s):  
Ho-Yin Wong ◽  
Wesley Chan ◽  
Ga-Lai Law
Keyword(s):  
Symmetric Space ◽  
Structural Properties ◽  
Light Emission ◽  
Molecular Packing ◽  
Mechanical Forces ◽  
Space Group ◽  
Aggregation Induced Emission ◽  
Crystal Structural

Triboluminescence (TL) is a form of light emission induced upon mechanical forces on the material. However, our understanding of this phenomenon is still unclear and more examples are therefore needed in order to elucidate its mechanism. In this work, two types of TL complexes, [Eu(pp-dbm-Cl2)3phen] and [Eu(mm-dbm-Cl2)3phen], which also displays aggregation-induced emission (AIE) were synthesized and investigated for its photo-physical and crystal structural properties. These complexes were crystallized in a centro-symmetric space group P21/n, and remarkably, displayed TL upon grinding that may be due to the presence of extensive π···π, C-H···π and C-H···Cl-C interactions in the close molecular packing of its structure. This rare example deviates from the widely accepted mechanism of TL, hence widening the scope of our understanding in the area.

Crystal structural properties of a pinwheel compound: [36](1,2,3,4,5,6)cyclophane

2000 ◽  
Vol 41 (41) ◽  
pp. 7933-7938 ◽  
Author(s):  
Mikio Yasutake ◽  
Youichi Sakamoto ◽  
Satoru Onaka ◽  
Katsuya Sako ◽  
Hitoshi Tatemitsu ◽  
...  
Keyword(s):  
Structural Properties ◽  
Crystal Structural

Synthesis and Spectroscopic Characteristics of Ligands Based on Quinolin-8-Ol as Useful Precursors for Alq3 Type Complexes

2021 ◽  
Vol 903 ◽  
pp. 168-173
Author(s):  
Elmārs Zariņš ◽  
Deins Alksnis ◽  
Patricija Paulsone ◽  
Karlis Balodis ◽  
Aivars Vembris ◽  
...  
Keyword(s):  
Solid State ◽  
Light Emission ◽  
Emission Property ◽  
Blue Luminescence ◽  
Reaction Conditions ◽  
Aggregation Induced Emission ◽  
Chemical Structures ◽  
Emission Enhancement ◽  
Spectroscopic Characteristics ◽  
Reliable Methods

In order to develop reliable methods for the synthesis of various 5-substituted-8-oxyquinoline derivatives for the preparation of Alq3-type complexes, we have improved the reaction conditions on some syntheses described in the literature, successfully synthesized new ligands based on quinolin-8-ol and characterized their chemical structures by NMR. Some of the synthesized quinolin-8-ol derivatives containing incorporated bulky triphenyl or tert-butyl groups showed blue luminescence in the solid state due to the possible aggregation induced emission enhancement (AIEE) with a maximum wavelength around 510 nm. More detailed light-emission property investigation of the mentioned bulky group containing compounds is currently underway.

Notizen: Einkristall-Strukturdaten einiger Fluoride und Cyanide A2IBIMIIIX6 der Elpasolithfamilie / Single Crystal Structural Data of Some Fluorides and Cyanides A2IBIMIIIX6 of the Elpasolite Family

1975 ◽  
Vol 30 (5-6) ◽  
pp. 462-464 ◽  
Author(s):  
R. Haegele ◽  
W. Verscharen ◽  
D. Babel
Keyword(s):  
Single Crystal ◽  
Structural Data ◽  
Space Group ◽  
X Ray ◽  
Lattice Constants ◽  
Structure Determinations ◽  
Crystal Structural Data ◽  
Crystal Structural

The parameters of complete X-ray structure determinations are given for the fluoridesRb2NaFeF6 and Rb2KFeF6 (cubic), Cs2NaCrF6 and Cs2NaFeF6 (hexagonal-rhom-bohedral) and Cs2LiGaF6 (hexagonal). Space group and lattice constants of the monoclinic cyanides Cs2BFe(CN)6 (B = Na, K, Rb) are reported as well.

Raman study of the structural properties of KNO3(II)

1977 ◽  
Vol 55 (7) ◽  
pp. 1242-1250 ◽  
Author(s):  
M. H. Brooker
Keyword(s):  
Single Crystals ◽  
Structural Properties ◽  
Raman Spectra ◽  
Excellent Agreement ◽  
Room Temperature ◽  
Group Analysis ◽  
Factor Group ◽  
Spectral Features ◽  
Space Group ◽  
Raman Study

Raman spectra of oriented single crystals of KNO3(II) have been recorded at 298 and 77 K. At both temperatures the data are in excellent agreement with the factor group analysis based on the generally accepted Pmcn space group. Additional spectral features observed near room temperature suggest the presence of a significant number of disordered nitrate groups on alternate lattice sites, although the majority of nitrate groups occupy the ordered sites. As the temperature is lowered, the disordered groups freeze out until near the temperature of reported electrical anomalies (213 K) only the ordered sites are occupied. Improved resolution has resulted in detection of a number of new spectral features while improved depolarization data have resulted in reassignment of several peaks.

Crystal structural properties of Ti3SnD

2002 ◽  
Vol 330-332 ◽  
pp. 166-168 ◽  
Author(s):  
Marie Vennström ◽  
Yvonne Andersson
Keyword(s):  
Structural Properties ◽  
Crystal Structural

Investigation of thermochromic photoluminescent, dielectric and crystal structural properties for an inorganic–organic hybrid solid of [1-hexyl-3-methylimidazolium][PbBr3]

2016 ◽  
Vol 40 (10) ◽  
pp. 8664-8672 ◽  
Author(s):  
Kun-Ming Wan ◽  
Yuan-Bo Tong ◽  
Li-Li Li-Li ◽  
Yang Zou ◽  
Hai-Bao Duan ◽  
...  
Keyword(s):  
Structural Properties ◽  
Dielectric Anomaly ◽  
Organic Hybrid ◽  
Crystal Structural

An imidazolium-based bromoplumbate hybrid solid shows fascinating luminescence thermochromism, appealing dielectric anomaly and relaxation.

A new strategy for achieving single-molecular white-light emission: using vibration-induced emission (VIE) plus aggregation-induced emission (AIE) mechanisms as a two-pronged approach

2019 ◽  
Vol 55 (13) ◽  
pp. 1879-1882 ◽  
Author(s):  
Huan Wang ◽  
Yiru Li ◽  
Yiyao Zhang ◽  
Ju Mei ◽  
Jianhua Su
Keyword(s):  
White Light ◽  
Light Emission ◽  
White Light Emission ◽  
Aggregation Induced Emission ◽  
New Strategy

Single-molecular white-light emissions were achieved through the simple but judicious combination of vibration-induced emission (VIE) and aggregation-induced emission (AIE) mechanisms.

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