A general and efficient method for direct β‐selective styrylation of BODIPYs has been developed based on Palladium(II)‐catalyzed oxidative C−Hfunctionalization. The high β‐regioselectivity was confirmed by X‐ray analysis. The resulting dyes showed bathochromically shifted absorption and emission compared to that of the starting BODIPYs. This strategy, as a late‐stage approach to rapidly assemble a
cross-dehydrogenative coupling of BODIPYs with toluene and its derivatives has been developed, allowing for the facile synthesis of a broad range of structurally diverse α-benzylated BODIPYs. The method exhibits excellent chemoselectivity, affording exclusively α-benzylated BODIPYs in the presence of t-BuOOH and a catalytic amount of Cu(OAc)2. The direct use of readily available toluene and its derivatives as coupling
Microfluidic Device for the Determination of Water Chlorination Levels Combining a Fluorescent <i>meso</i>-Enamine Boron Dipyrromethene Probe and a Microhydrocyclone for Gas Bubble Separation
作者:Adam Tillo、Juergen Bartelmess、Vraj P. Chauhan、Jérémy Bell、Knut Rurack
DOI:10.1021/acs.analchem.9b03039
日期:2019.10.15
Chlorination procedures are commonly applied in swimming pool water and wastewater treatment, yet also in food, pharmaceutical, and paper production. The amount of chlorine in water needs to be strictly controlled to ensure efficient killing of pathogens but avoid the induction of negative health effects. Miniaturized microfluidic fluorescence sensors are an appealing approach here when aiming at online
氯化程序通常用于游泳池水和废水处理中,但也用于食品,药品和造纸中。需要严格控制水中的氯含量,以确保有效杀死病原体,但避免引起负面的健康影响。当针对在线或现场测量时,小型化微流体荧光传感器是一种吸引人的方法。两个中观-烯胺取代的硼二吡咯亚甲基(BODIPY)染料具有良好的指示性能,它们与次氯酸盐的反应导致强烈的荧光增强。将这些荧光探针与设计的二维(2D)和三维(3D)微流控芯片集成在一起后,可以分别进行无源正弦混合器和微水力旋流器的实时检测。两种微流体系统的比较,包括它们防止由化学指示反应产生的微气泡积聚或循环的能力,显示了基于微水力旋流器的装置优异的流体行为。耦合至小型光学阅读器进行荧光检测后,二维微流体系统显示出有希望的检测范围为0.04–0.5 mg L –1同时仍然容易产生气泡引起的波动,并遭受相当低的信号增益。基于微型水力旋流器的系统对气泡的抵抗力更强,显示出更高的信号增益,并使我们将检出限减半至0
Methylated Unsymmetric BODIPY Compounds: Synthesis, High Fluorescence Quantum Yield and Long Fluorescence Time
作者:Xian-Fu Zhang、George Q. Zhang、Jiale Zhu
DOI:10.1007/s10895-019-02349-5
日期:2019.3
rate constant, but causes the decrease in fluorescence lifetime. H-bonding solvents increase both the fluorescence lifetime and quantum yields. The methylated BODIPYs show the ability to generate singletoxygen (1Δg) which is evidenced by near-IR luminescence and DPBF chemical trapping techniques. The formation quantum yield of singletoxygen (1Δg) for the compounds is up to 0.15 ± 0.05.
我们表明,通过不对称反应方法可以轻松有效地合成具有一个,两个和三个甲基的不对称BODIPY化合物。在不同极性的溶剂中检查了它们的稳态和时间分辨的荧光性质。这些化合物显示出高的荧光量子产率(0.87至1.0),长的荧光寿命(5.89至7.40 ns)和小的斯托克斯位移(199至443 cm -1))。甲基取代表现出对UV-Vis吸收和荧光性质的影响,例如发射光谱和吸收光谱中的蓝移。扮演重要角色的是甲基而不是位置。除3 M-BDP以外,BODIPY核上甲基的数量增加导致荧光量子产率和辐射速率常数的增加,但导致荧光寿命的降低。氢键溶剂可延长荧光寿命和量子产率。甲基化BODIPYs显示以产生单线态氧的能力(1 Δ克),其通过近红外发光和DPBF化学捕集技术证实。单线态氧的生成的量子产率(1 Δ克)的化合物最大为0.15±0.05。
Exploring the Application of the Negishi Reaction of HaloBODIPYs: Generality, Regioselectivity, and Synthetic Utility in the Development of BODIPY Laser Dyes
作者:Eduardo Palao、Gonzalo Duran-Sampedro、Santiago de la Moya、Miriam Madrid、Carmen García-López、Antonia R. Agarrabeitia、Bram Verbelen、Wim Dehaen、Nöel Boens、María J. Ortiz
DOI:10.1021/acs.joc.6b00350
日期:2016.5.6
generality of the palladium-catalyzed C–C coupling Negishi reaction when applied to haloBODIPYs is demonstrated on the basis of selected starting BODIPYs, including polyhalogenated and/or asymmetrical systems, and organozinc reagents. This reaction is an interesting synthetic tool in BODIPY chemistry, mainly because it allows a valuable regioselective postfunctionalization of BODIPY chromophores with