1533-45-5 Usage
Description
2,2'-(1,2-Ethenediyldi-4,1-phenylene)bisbenzoxazole, also known as 4,4′-Bis(2-benzoxazolyl)stilbene (BBS), is a bright yellow crystalline powder with a greenish shade. It is a solid with a melting point of 355-360°C and a purity of at least 98.5%. BBS is known for its consistently high absolute fluorescence quantum yields and a monoexponential lifetime in solutions. It is also reported as a food-grade dye and an excimer-forming, photoluminescent chromophore.
Uses
Used in Plastic Industry:
2,2'-(1,2-Ethenediyldi-4,1-phenylene)bisbenzoxazole is used as a viscosity-sensitive fluorophore for investigating the curing parameters in the fabrication of UV-cured automotive organic protective coatings.
Used in Sensor Technology:
2,2'-(1,2-Ethenediyldi-4,1-phenylene)bisbenzoxazole is used in the preparation of polymeric film sensors based on excimer luminescence and responsive to both mechanical and temperature stress. It is dispersed into a thermoplastic aliphatic biodegradable polyester [poly(1,4-butylene succinate)] to create these sensors.
Used as a Food-Grade Dye:
2,2'-(1,2-Ethenediyldi-4,1-phenylene)bisbenzoxazole is used as a dye in the food industry due to its bright yellow color and greenish shade.
Used in Research and Development:
2,2'-(1,2-Ethenediyldi-4,1-phenylene)bisbenzoxazole is used as an excimer-forming, photoluminescent chromophore in various research and development applications, particularly in the study of photophysics and fluorescence properties.
Flammability and Explosibility
Notclassified
TEST ITEMS
SPECIFICATION
METLING POINT
355-360
°
C
PURITY
98.5% min
FINENESS
300 mesh min
Check Digit Verification of cas no
The CAS Registry Mumber 1533-45-5 includes 7 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 4 digits, 1,5,3 and 3 respectively; the second part has 2 digits, 4 and 5 respectively.
Calculate Digit Verification of CAS Registry Number 1533-45:
(6*1)+(5*5)+(4*3)+(3*3)+(2*4)+(1*5)=65
65 % 10 = 5
So 1533-45-5 is a valid CAS Registry Number.
InChI:InChI=1/C28H18N2O2/c1-3-7-25-23(5-1)29-27(31-25)21-15-11-19(12-16-21)9-10-20-13-17-22(18-14-20)28-30-24-6-2-4-8-26(24)32-28/h1-18H/b10-9+
1533-45-5Relevant articles and documents
Production process of fluorescent whitening agent OB-1
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Paragraph 0030; 0037; 0046-0055, (2021/03/11)
The invention relates to a production process of a fluorescent whitening agent OB-1. The production process specifically comprises the following steps: 1, carrying out condensation reaction on p-toluic acid and o-aminophenol to generate 4-methyl phenyl benzoxazole; 2, carrying out distillation treatment after the condensation reaction is finished, and collecting a main fraction 4-methyl intermediate; 3, adding methanol into the main fraction, keeping the temperature at 60 DEG C for 6 hours, cooling to 10 DEG C, centrifugally filtering, drying, and transferring into a vulcanization synthesis kettle; 4, carrying out a vulcanization synthesis reaction on the 4-methyl intermediate to generate OB-1, rinsing with xylene, repeatedly washing with xylene, and drying the xylene by distillation to obtain a dried OB-1 crude product; 5, adding trichlorobenzene, the OB-1 crude product and activated carbon into a refining kettle to refine OB-1; and 6, pulping and washing OB-1 with methanol, carryingout centrifugal separation, and drying a filtering cake to obtain the OB-1 product. The method is environmentally friendly, safe and high in yield.
Synthesis and spectral-luminescence properties of 4,4′-di(2-oxazolyl)-stilbenes and 4,4′-di(2-oxazolyl)tolans
Vernigor,Shalaev,Luk'yanets
, p. 328 - 332 (2007/10/02)
A new method is proposed for the synthesis of 4,4′-di(2-oxazolyl)stilbenes and 4,4′-di(2-oxazolyl) tolans by condensation of oxazolyl-substituted benzyl bromides or benzal dibromides under the influence of strong bases (KOH, potassium tertbutoxide) in dipolar aprotic solvents [dimethylformamide (DMF) and dimethyl sulfoxide (DMSO)]. The synthesized compounds luminesce intensely over the spectral range 386-492 nm.
