2436-79-5Relevant articles and documents
Synthesis and properties of a bilirubin analog with propionic acid groups replaced by carboxyl
Byun,Lightner
, p. 1683 - 1692 (1991)
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Low-cost clean method for preparing 2,4-dimethyl pyrrole-3,5-dicarboxylate
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, (2021/07/24)
The invention discloses a low-cost clean method for preparing 2,4-dimethyl pyrrole-3,5-dicarboxylate. The method comprises the following steps: mixing ethyl acetoacetate or tert-butyl acetoacetate with glacial acetic acid, slowly introducing inert gas into the mixed solution for 30 minutes, then introducing a nitrosation reagent nitric oxide gas at the flow rate of 0.5-1mL/min, conducting reacting at room temperature for 10 hours, controlling the temperature of the reaction solution to be 40 DEG C or lower, adding zinc powder in batches, dropwise adding ethyl acetoacetate at the same time, conducting reacting at 95 DEG C for 4 hours, conducting cooling, adding a reaction solution into ice water, conducting filtering, recrystallizing a filter cake with ethanol to obtain white ethyl 2,4-dimethyl pyrrole-3,5-dicarboxylate, and concentrating a filtrate to recover zinc acetate and acetic acid so as to realize the cleanness of the preparation process.
Design and synthesis of perfluoroalkyl decorated BODIPY dye for random laser action in a microfluidic device
Maity, Apurba,Sarkar, Anirban,Bhaktha B.n, Shivakiran,Patra, Sanjib K.
supporting information, p. 14650 - 14661 (2020/10/02)
New and highly emissive 2,6-diacetynyl and 2,6-bis-(phenylacetynyl) functionalized pentamethyldifluoroboron-dipyrromethane (BODIPY) derivatives (FBDP1-2) with perfluorinated pendant groups at the boron center have been synthesized successfully by the combination of two strategies: extending the π-conjugation and functionalization at the boron centre. The newly synthesized dyes have been characterized unambiguously by using various analytical tools such as multinuclear NMR, MALDI-TOF, and single crystal XRD analysis. The dyes (FBDP1-2) exhibit excellent photophysical properties in the yellow to red spectral region (λabs = 530 nm and 555 nm, and λem = 555 nm and 596 nm, respectively) with relatively good Stokes shifts (849 cm-1 and 1240 cm-1), high quantum efficiency (?F = 0.72 and 0.61) and excellent brightness (2.95 × 104 and 2.38 × 104 M-1 cm-1). Most importantly, under a transverse pumping condition at 532 nm, the dyes show efficient and stable laser action, having a good tunable range (20 nm and 13 nm) with a maximum lasing efficiency of 45% and 38% for FBDP1 and FBDP2, respectively. Moreover, the random lasing behavior of FBDP1 has been investigated in a dye-circulated polydimethylsiloxane (PDMS) based disordered microfluidic device. The appearance of randomly positioned sharp spikes with a full width at half maximum (FWHM) of less than 0.3 nm around 555 nm indicates the random laser (RL) emission. The relationship between input pump energy and output random lasing intensity has also been demonstrated, with the random lasing threshold of 0.5 mJ.
