Synthesis and solid-state fluorescence properties of pentacyclic 7-substituted-indeno[1′,2′:4,5]pyrido[2,1-a]isoindol-5-ones

RSC Advances ◽  
2015 ◽  
Vol 5 (4) ◽  
pp. 2715-2723 ◽  
Author(s):  
Z. Chamas ◽  
E. Marchi ◽  
B. Presson ◽  
E. Aubert ◽  
Y. Fort ◽  
...  
Keyword(s):  
Solid State ◽  
Crystal Packing ◽  
Fluorescence Properties ◽  
Quantum Yields ◽  
Solid State Fluorescence ◽  
Packing Analysis

New pentacyclic indeno[1′,2′:4,5]pyrido[2,1-a]isoindol-5-ones were designed which possess quantum yields in the solid state up to 32%. The importance of the substituent in 7-position was highlighted through crystal packing analysis.

Carbazole-modified thiazolo[3,2-c][1,3,5,2]oxadiazaborinines exhibiting aggregation-induced emission and mechanofluorochromism

2021 ◽  
Author(s):  
Mykhaylo A. Potopnyk ◽  
Mykola Kravets ◽  
Roman Luboradzki ◽  
Dmytro Volyniuk ◽  
Volodymyr Sashuk ◽  
...  
Keyword(s):  
Solid State ◽  
Fluorescence Properties ◽  
Aggregation Induced Emission ◽  
Donor Acceptor ◽  
Solid State Fluorescence ◽  
Active Donor

Two novel AIE-active donor–acceptor organoboron complexes with a carbazole donor unit are developed and their morphology-dependent solid-state fluorescence properties are established.

scholarly journals Indenopyrans – synthesis and photoluminescence properties

2016 ◽  
Vol 12 ◽  
pp. 825-834 ◽  
Author(s):  
Andreea Petronela Diac ◽  
Ana-Maria Ţepeş ◽  
Albert Soran ◽  
Ion Grosu ◽  
Anamaria Terec ◽  
...  
Keyword(s):  
Solid State ◽  
Emission Band ◽  
Fluorescence Spectra ◽  
Photophysical Properties ◽  
Quantum Yields ◽  
Band Broadening ◽  
Photoluminescence Properties ◽  
Fluorescence Quantum Yields ◽  
Blue Emitters ◽  
Solid State Fluorescence

New indeno[1,2-c]pyran-3-ones bearing different substituents at the pyran moiety were synthesized and their photophysical properties were investigated. In solution all compounds were found to be blue emitters and the trans isomers exhibited significantly higher fluorescence quantum yields (relative to 9,10-diphenylanthracene) as compared to the corresponding cis isomers. The solid-state fluorescence spectra revealed an important red shift of λmax due to intermolecular interactions in the lattice, along with an emission-band broadening, as compared to the solution fluorescence spectra.

Impact of molecular packing rearrangement on solid-state fluorescence: polyhalogenated N-hetarylamines vs. their co-crystals with 18-crown-6

CrystEngComm ◽  
2019 ◽  
Vol 21 (39) ◽  
pp. 5931-5946 ◽  
Author(s):  
Tamara A. Vaganova ◽  
Yurij V. Gatilov ◽  
Enrico Benassi ◽  
Igor P. Chuikov ◽  
Denis P. Pishchur ◽  
...  
Keyword(s):  
Solid State ◽  
Chemical Structure ◽  
Crystal Packing ◽  
Molecular Packing ◽  
Solid State Fluorescence

Relationship between the hetarylamine chemical structure, crystal packing in homo- and co-crystals, and fluorescence effects (quenching, bathochromic and hypsochromic shifts).

Construction of a family of Ln3 clusters using multidentate Schiff base and β-diketonate ligands: fluorescence properties, magnetocaloric effect and slow magnetic relaxation

2020 ◽  
Vol 44 (22) ◽  
pp. 9230-9237 ◽  
Author(s):  
Wen-Min Wang ◽  
Yu Gao ◽  
Rong-Xin Yue ◽  
Na Qiao ◽  
Dan-Tong Wang ◽  
...  
Keyword(s):  
Schiff Base ◽  
Solid State ◽  
Magnetocaloric Effect ◽  
Magnetic Relaxation ◽  
Magnetic Refrigeration ◽  
Fluorescence Properties ◽  
Slow Magnetic Relaxation ◽  
Solid State Fluorescence

Seven μ-Oacylhydrazone-bridged Ln3 clusters were synthesized. Cluster 3 displayed magnetic refrigeration properties, whereas cluster 5 showed slow magnetic relaxation. The solid-state fluorescence properties of 2, 4 and 5 were also studied.

Investigation of molecular arrangements and solid-state fluorescence properties of solvates and cocrystals of 1-acetyl-3-phenyl-5-(9-anthryl)-2-pyrazoline

CrystEngComm ◽  
2014 ◽  
Vol 16 (26) ◽  
pp. 5820-5826 ◽  
Author(s):  
Qi Feng ◽  
Mingliang Wang ◽  
Chunxiang Xu ◽  
Arshad Khan ◽  
Xiaojuan Wu ◽  
...  
Keyword(s):  
Solid State ◽  
Title Compound ◽  
Fluorescence Properties ◽  
Fluorescence Modulation ◽  
Solid State Fluorescence

The arrangement of the title compound (crystal I) was regulated via different solvates and cocrystals (crystals II–V) for fluorescence modulation.

Highly efficient solid-state red fluorophores using ESIPT: crystal packing and fluorescence properties of alkoxy-substituted dibenzothiazolylphenols

CrystEngComm ◽  
2014 ◽  
Vol 16 (15) ◽  
pp. 3180 ◽  
Author(s):  
Ken-ichi Sakai ◽  
Hiroshi Kawamura ◽  
Noriyuki Kobayashi ◽  
Takaaki Ishikawa ◽  
Chiori Ikeda ◽  
...  
Keyword(s):  
Solid State ◽  
Crystal Packing ◽  
Fluorescence Properties ◽  
Highly Efficient

Preparation and Properties of Surfactant Complexes of Ruthenium(II)

1979 ◽  
Vol 32 (7) ◽  
pp. 1453 ◽  
Author(s):  
O Johansen ◽  
C Kowala ◽  
AWH Mau ◽  
WHF Sasse
Keyword(s):  
Solid State ◽  
Surface Pressure ◽  
Luminescence Intensity ◽  
Crystal Packing ◽  
Emission Spectra ◽  
Quantum Yields ◽  
Alkyl Chains ◽  
Pressure Area ◽  
Bimolecular Quenching ◽  
Chain Lengths

New surfactant complexes RuM2L2+ have been prepared where M is 2,2'-bipyridyl or o-phenanthro- line and L is one of the 4-alkyl-4'-methyl-2,2'-bipyridyls (8a)-(8e), or one of the 4,4'-dialkyl-2,2'- bipyridyls (9a)-(9e), or 1,1'-(2,2'-bipyridyl-4,4'-diyl)bis(nonadecan-1-one). This diketone was pre- pared from 2,2'-bipyridyl-4,4'-dicarboxylic acid and dioctadecylcadmium; the dialkylbipyridyls were obtained by condensing 4,4'-dimethyl-2,2'-bipyridyl with 5-alkylthiopen-2-carbaldehydes, followed by desulfurization with W5 Raney nickel. Several properties of the new complexes have been compared with those of bis(2,Y-bipyridyl)(dioctadecyl 2,2'-bipyridyl-4,4'-dicarboxy1ate)ruthenium dication (2). Monolayers have been prepared and characterized by surface-pressure area curves; film com- pressibilities and stabilities are related to the lengths of the alkyl chains and to subphase composition. Absorption and emission spectra have been examined. The quantum yields and lifetimes of emission are similar in alcohol and water; with monolayer assemblies they are dependent on subphase com- position, and in the solid state they vary between 0.03-0.18 for Φ and 0.5-1.5 μs for τ, according to the chain lengths, which appear to affect crystal packing. Oxygen quenched the luminescence of solutions and supported monolayers reversibly; Stern- Volmer constants and bimolecular quenching constants are given for: diester complex (2), diketone complex (6), dialkylbipyridyl complexes (5). Except with (2) the original luminescence intensity was restored by drying. Hydrogen was not detected following irradiation with visible light of supported monolayers of pure complexes immersed in water.

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