Modulation of the photophysical properties of multi-BODIPY-siloxane conjugates by varying the number of fluorophores
作者:Alexey A. Pakhomov、Eleonora E. Kim、Yuriy N. Kononevich、Dmitriy S. Ionov、Margarita A. Maksimova、Veronika B. Khalchenia、Eugene G. Maksimov、Anton A. Anisimov、Olga I. Shchegolikhina、Vladimir I. Martynov、Aziz M. Muzafarov
DOI:10.1016/j.dyepig.2022.110371
日期:2022.7
A series of multifluorophore compounds with two, four, six and eight BODIPY residues linked to a siloxane core via a flexible spacer was synthesized. An increasing number of BODIPY units caused an enhanced propensity to chromophore aggregation with characteristic photophysicaleffects evoked by the aggregation. The increase in the number of fluorophores additionally resulted in considerable increase
Developing fluorescent chemosensors with sensitivity and high specificity for recognizing fluorides is still challenging. Herein, four innovative compounds based on 13-8-13-membered tricyclic ladder-type siloxanes hybridized with BINOLs (abbreviated as TLS-BINOLs) were prepared through the B(C6F5)3-catalyzed Piers–Rubinsztajn reaction. The well-defined ladder-type structure of the TLS-BINOLs was determined
开发具有灵敏度和高特异性的荧光化学传感器来识别氟化物仍然具有挑战性。在此,通过B(C 6 F 5 ) 3催化的Piers-Rubinsztajn反应制备了四种基于13-8-13元三环梯型硅氧烷与BINOL杂化的创新化合物(简称TLS-BINOL)。通过 X 射线晶体学分析确定了 TLS-BINOL 的明确梯形结构。此外,还研究了 TLS-BINOL 对阴离子的荧光传感能力。我们的研究结果表明,所有四种梯型化合物(TLS-BINOL)在通过氟化物触发的结构分解识别氟化物方面表现出高度特异性。各个 TLS-BINOL 的氟化物检测限确定为 0.37、0.35、0.39 和 0.48 μM。还使用单晶 X 射线衍射分析测定了由氟化物诱导的非发射产物。
Tetrachromophoric Derivatives of Dibenzoylmethanatoboron Difluoride Based on Stereoregular Cyclotetrasiloxanes: Synthesis and Properties
作者:Anastasia S. Belova、Yuriy N. Kononevich、Dmitriy S. Ionov、Viacheslav A. Sazhnikov、Anton A. Anisimov、Andrey A. Safonov、Nikolay M. Surin、Evgeniya A. Svidchenko、Yury V. Fedorov、Olga I. Shchegolikhina、Aziz M. Muzafarov
DOI:10.1021/acs.jpcb.3c02300
日期:2023.7.6
tetracyclosiloxanes and dibenzoylmethanatoborondifluoridederivatives have been synthesized and characterized by a complex of physicochemical methods. The photophysicalproperties of the synthesized compounds are studied by electronic absorption, steady-state, and time-resolved fluorescence spectroscopy. In the synthesized compounds, four dibenzoylmethanatoborondifluoride (DBMBF2)-based fluorophores
通过一系列物理化学方法合成并表征了一系列基于有规四环硅氧烷和二苯甲酰甲烷硼二氟化物衍生物的新型四发色体系。通过电子吸收、稳态和时间分辨荧光光谱研究了合成化合物的光物理性质。在合成的化合物中,四二苯甲酰甲烷硼二氟化物(DBMBF 2) 基荧光团相对于环四硅氧烷支架呈全顺式排列。DFT 计算预测它们可以形成基态偶极矩反平行方向的 H 型二聚体、三聚体或四聚体。在紫外线激发下,这些化合物在极性和非极性溶剂中的溶液表现出复杂的荧光,由具有不同寿命的单体和准分子发射组成。全局拟合分析揭示了至少四种动力学上可区分的物质处于激发态。所研究的溶液中的化合物的 CIE 色度坐标非常接近白色点,是开发下一代白色照明单发射材料的有希望的对象。
Synthesis and characterization of sulfide/sulfone-containing 18-8-18-membered-ring ladder-type siloxanes
and tricyclic 18-8-18-membered-ring ladder-type siloxane-based compound (7), with sulfide units inserted in the backbone were prepared through B(C6F5)3-catalyzed Piers–Rubinsztajn reaction. Further oxidation of 5 and 7 with m-CPBA enables the synthesis of the novel sulfonyl-containing cyclic and ladder-type compound (8 and 9) in high yields. Both tricyclic ladder-type products (7 and 9) show superior
Synthesis of Siloxane Derivatives of Phenylboronic Acids of Different Structures
作者:Elizaveta A. Manokhina、Anton A. Anisimov、Fedor V. Drozdov、Rinat S. Tukhvatshin、Alexander S. Peregudov、Svetlana A. Aksenova、Aziz M. Muzafarov
DOI:10.1021/acs.joc.3c00504
日期:2023.7.7
The synthesis of a storage-stable organosilicon modifier with a dioxaborolane-protecting group is described. Its high reactivity and selective anti-Markovnikov addition in hydrosilylation reactions to afford siloxanes of various structures are shown. The possibility of deprotection of both the initial modifier and its siloxane derivatives under mild conditions using water in yields up to 96% is demonstrated
描述了具有二氧硼杂硼烷保护基团的储存稳定的有机硅改性剂的合成。它在氢化硅烷化反应中表现出高反应性和选择性的抗马尔可夫尼科夫加成,以提供各种结构的硅氧烷。证明了在温和条件下使用水对初始改性剂及其硅氧烷衍生物进行脱保护的可能性,产率高达 96%。1 H NMR光谱和X射线衍射分析数据证实了苯基硼酸的有机硅衍生物与其环状六元环硼氧烷之间存在平衡。研究了苯基硼酸硅氧烷衍生物在 Suzuki-Miyaura 和 Chan-Lam 交叉偶联反应中的应用。所有合成的化合物均通过 NMR 进行表征(1H、11 B、13 C 和29 Si)、红外光谱和高分辨率质谱。