Light emitting materials

Synthesis and photoluminescent properties of 2,6-di(4 -bisphenylaminostilbenyl) benzo[l-2,4-5]bisoxazole were reported [55]. The compound has been synthesized 

N=N double bond as a conjugation bridge was superior in nonlinear optical properties. 

TAEs with structurally bulky groups, such as pyrene and fluoranthene, located at both ends of the vinyl group are also easily accessible through the McMurry 

Molecular structures of pyrene- or fluoranthene-substituted ethenes 55 

In contrast to the general belief that excimer formation quenches the light emission of the chromophores, 55 is an exception. Compound 55 shows efficient 

The fluoranthene-substituted ethene 56 also shows excellent AIE effect [40]. Its 4 p value in solution is as low as 0.68%, while in the sohd state it is boosted to unity. It is also thermally and morphologically stable, with a high decomposition of 366°C and a glass-transition temperature of 137 °C. The excellent solid-state emission and high thermal stability enable it to function as light emitter for efficient OLEDs. Compound 56 exhibits yellow EL emission, with a peak at 

548 nm, which is red-shifted by 32 run compared to that of compound 55, disclosing that the EL emission of the TAEs can be well modulated by the aromatic substituents. The device using 56 as the light-emitting layer affords a high luminance of 20 520 cd m as well as good EL current and external quantum efficiency up to 10 cd and 3.1%, respectively. 

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The opto-electronic properties of branched structures have been an area of some interest for a number of years, especially as NLO and light-emitting materials [82]. In particular, the use of u-conjugated dendrimers (mono-disperse macromolecules [83]) has flourished for a number of reasons ... 

Kim E, Park SB (2009) Chemistry as a prism a review of light-emitting materials having tunable emission wavelengths. Chem Asian J 4 1646-1658... 

The understanding of phosphors and solid-state luminescence has matured to the point at which relatively rational design and preparation of new light-emitting materials can be achieved. This has resulted from advances in solid-state physics and optical spectroscopy coupled to the development of new chemical synthesis techniques. This has led to the rapid development of phosphors as important industrial/technological materials. Examples of the occurrence of phosphors in everyday use include ... 

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