Pentopyranosyl nucleosides. II. 6-Mercapto- and other substituted derivatives of 9-D-arabino- and 9-D-xylopyranosylpurine. Synthesis and spectral properties

1969 ◽  
Vol 34 (2) ◽  
pp. 416-421 ◽  
Author(s):  
Abelardo P. Martinez ◽  
William W. Lee
Keyword(s):  
Spectral Properties ◽  
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.

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.

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.

TRYPTAMINES, CARBOLINES, AND RELATED COMPOUNDS: PART VIII. δ-CARBOLINE

1960 ◽  
Vol 38 (11) ◽  
pp. 2152-2160 ◽  
Author(s):  
R. A. Abramovitch ◽  
K. A. H. Adams ◽  
A. D. Notation
Keyword(s):  
Spectral Properties ◽  
Dry Distillation ◽  
Derivatives Of ◽  
Related Compounds

The first unambiguous synthesis of δ-carboline has been achieved starting with 3-amino-2-phenylpyridine. This was converted to the azide which was thermally cyclized to δ-carboline. The carboline gave a py-N-methiodide which was converted to the anhydronium base. The pKa of the anhydronium base was determined and its significance is discussed. The anhydronium base formed a methiodide which, on dry distillation, gave ind-N-methyl-δ-carboline. The spectral properties of the various derivatives of δ-carboline were examined and the bond structures of the anhydronium base and the methiodides are discussed.

Synthesis and spectral properties of some N-substituted derivatives of phenol blue

1971 ◽  
Vol 36 (23) ◽  
pp. 3497-3501 ◽  
Author(s):  
J. Figueras ◽  
P. W. Schullard ◽  
A. R. Mack
Keyword(s):  
Spectral Properties ◽  
Phenol Blue ◽  
Derivatives Of

scholarly journals First principles investigation of the spectral properties of neutral, zwitterionic, and bis-cationic azaacenes

2019 ◽  
Vol 21 (41) ◽  
pp. 22910-22918
Author(s):  
Patricia Guevara-Level ◽  
Simon Pascal ◽  
Olivier Siri ◽  
Denis Jacquemin
Keyword(s):  
Optical Properties ◽  
First Principles ◽  
Spectral Properties ◽  
Electronic Nature ◽  
Derivatives Of

An in-depth investigation of the optical properties of recently-synthesized linear azaacene derivatives of various electronic nature (neutral, dicationic, and zwitterionic) is presented.

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