Spectral properties of derivatives of naphthoylenebenzimidazole in isotropic and liquid crystalline media

1998 ◽  
Author(s):  
Ewa Mykowska ◽  
Katarzyna Jazwinska ◽  
Wojciech Grupa ◽  
Danuta Bauman
Keyword(s):  
Spectral Properties ◽  
Liquid Crystalline ◽  
Derivatives Of

Poly(methyl-phenylsilylene) Derivatives as Photoconductors

1993 ◽  
Vol 58 (10) ◽  
pp. 2337-2348 ◽  
Author(s):  
Ivan Kmínek ◽  
Stanislav Nešpůrek ◽  
Eduard Brynda ◽  
Jiří Pfleger ◽  
Věra Cimrová ◽  
...  
Keyword(s):  
Spectral Properties ◽  
Long Wavelength ◽  
Langmuir Blodgett ◽  
Ultrathin Layers ◽  
Polar Derivatives ◽  
Derivatives Of

The attachment of long wavelength absorbing π-conjugated chromophores to poly(methyl-phenylsilylene) (PMPSi) via reactions of its formylated derivative is described. Some of the obtained polymers exhibit improved photostability in comparison with the parent polymer. Their spectral properties and photoconductivity are discussed. Ultrathin layers and multilayers were prepared from polar derivatives of PMPSi by the Langmuir-Blodgett technique and their photoconductive behaviour was studied.

Photoconductive Liquid-Crystalline Derivatives of 6-Oxoverdazyl

2012 ◽  
Vol 134 (5) ◽  
pp. 2465-2468 ◽  
Author(s):  
Aleksandra Jankowiak ◽  
Damian Pociecha ◽  
Jacek Szczytko ◽  
Hirosato Monobe ◽  
Piotr Kaszyński
Keyword(s):  
Liquid Crystalline ◽  
Derivatives Of

Synthesis of Red Luminescent Non Symmetric Styryl-4H-Pyran-4-Ylidene Fragment Containing Derivatives for Organic Light-Emitting Diodes

2011 ◽  
Vol 222 ◽  
pp. 271-274 ◽  
Author(s):  
Elmars Zarins ◽  
Janis Jubels ◽  
Valdis Kokars
Keyword(s):  
Organic Solvents ◽  
Spectral Properties ◽  
Light Emitting Diodes ◽  
Organic Light Emitting Diodes ◽  
Amorphous Films ◽  
Light Emitting ◽  
Organic Light ◽  
Volatile Organic ◽  
Derivatives Of

New organic glassy non symmetric styryl- derivatives of 2(2,6-substituted-4H-pyran-4-ylidene)-malononitrile, 2(2,6-substituted-4H-pyran-4-ylidene)-1H-indene-1,3(2H)-dione and 2(2,6-substituted-4H-pyran-4-ylidene)-pyrimidine-2,4,6(1H,3H,5H)-trione were synthesized. They form thin solid amorphous films from volatile organic solvents (DCM and chloroform). Their spectral properties have been studied.

scholarly journals Perylene-like Dyes in Liquid Crystalline Media

1996 ◽  
Vol 51 (7) ◽  
pp. 843-850 ◽  
Author(s):  
Ewa Mykowska ◽  
Danuta Bauman
Keyword(s):  
Phase Transition ◽  
Transition Temperature ◽  
Order Parameter ◽  
Liquid Crystalline ◽  
Fluorescent Dyes ◽  
Liquid Crystal Display ◽  
Isotropic Phase ◽  
Display Devices ◽  
Electrooptical Properties ◽  
Derivatives Of

Abstract The spectral and electrooptical properties of some dichroic fluorescent dyes (derivatives of 3.4,9,10-perylenetetracorboxylic acid and of 3,4,9-perylenetricarboxylic acid) in isotropic solvents and nematic liquid crystals have been studied. The order parameter of the dyes in the anisotropic matrices has been determined by means of optical spectroscopy methods. Moreover, the influence of the dye addition on the nematic-isotropic phase transition temperature of the pure host has been investigated. It was found that some of the dyes studied can be utilized in guest-host liquid crystal display devices.

A novel class of mesogens: liquid-crystalline derivatives of linear oligoalkylene amides

1995 ◽  
Vol 5 (12) ◽  
pp. 2247 ◽  
Author(s):  
Uwe Stebani ◽  
G�nter Lattermann ◽  
Reinhard Festag ◽  
Michael Wittenberg ◽  
Joachim Heinz Wendorff
Keyword(s):  
Liquid Crystalline ◽  
Derivatives Of

ChemInform Abstract: Novel Synthesis of Calamitic and Discotic Liquid Crystalline Derivatives of Tetrathiafulvalene (TTF).

ChemInform ◽  
2010 ◽  
Vol 29 (18) ◽  
pp. no-no
Author(s):  
R. A. BISSELL ◽  
N. BODEN ◽  
R. J. BUSHBY ◽  
C. W. G. FISHWICK ◽  
E. HOLLAND ◽  
...  
Keyword(s):  
Liquid Crystalline ◽  
Novel Synthesis ◽  
Derivatives Of

Liquid Crystalline Derivatives of Bis(tricarbollide)Fe(II)

2007 ◽  
Vol 46 (15) ◽  
pp. 6078-6082 ◽  
Author(s):  
Adam Januszko ◽  
Piotr Kaszynski ◽  
Bohumír Grüner
Keyword(s):  
Liquid Crystalline ◽  
Derivatives Of

NEW CHROMOGENIC SUBSTRATES FOR THE DETERMINATION OF COAGULATION AND FIBRINOLYSIS ENZYMES

1987 ◽  
Author(s):  
W Stüber ◽  
D Schiwek ◽  
U Becker ◽  
N Heimburger
Keyword(s):  
Serine Proteases ◽  
Spectral Properties ◽  
Protein C ◽  
Activated Protein C ◽  
Peptide Sequence ◽  
Blue Dye ◽  
Chromogenic Substrates ◽  
New Type ◽  
Derivatives Of

A new type of chromogenic substraces based on derivatives of phenoxazine is presented. Particularly interesting is the blue dye 7-amino-3-diethylamino-8-methylphenoxazine (ADMP) with a molar extinktion coefficient of about 80,000 at 624 nm. Peptides were linked to the aminogroup of the dye and red coloured substrates were obtained with a λmax value of about 540 nm. On account of the distinct difference of the λmax values and the negligable influence of the absorption peaks of the acylated and the free dye this chromophore is suitable for the synchesis of substrates. Besides the spectral properties of chese new chromogenic peptides we determined their characce-riscics using serine proteases involved in the process of coagu-lacion and fibrinolysis. In comparison co para-nitroaniline substrates the introduction of the relatively bulky ADMP into the peptide sequence led to products with superior properties in respect of sensitivity and specificity.It was found that the ADMP substrates are particularly favourable for the determination of thrombin, urokinase and activated protein C in the presence of other proteases.

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