Synthesis, Structure, and Properties of Supramolecular Photoswitches Based on Ammonioalkyl Derivatives of Crown Ether Styryl Dyes
作者:Sergey P. Gromov、Artem I. Vedernikov、Natalia A. Lobova、Lyudmila G. Kuz’mina、Svetlana N. Dmitrieva、Yuri A. Strelenko、Judith A. K. Howard
DOI:10.1021/jo5018074
日期:2014.12.5
ammonioalkyl N-substituent and benzocrown ether moieties of different sizes and with different sets of heteroatoms was developed. Spontaneous “head-to-tail” dimerization of these dyes via the formation of numerous hydrogen bonds between the terminal NH3+ groups and crownether moieties was detected in MeCN solutions. The stability constants of the dimeric complexes having pseudocyclic structure were studied
开发了衍生自4-吡啶和4-喹啉并具有不同尺寸和不同组杂原子的氨烷基N-取代基和苯并冠醚部分的新型苯乙烯基染料的合成。在MeCN溶液中检测到这些染料通过在末端NH 3 +基团和冠醚部分之间形成许多氢键而自发地从“头到尾”二聚。通过1 H NMR滴定研究了具有假环结构的二聚配合物的稳定性常数。最稳定的配合物(log K d在染料中带有18冠6醚部分的情况下,最高可达8.2),这对于结合伯铵基团是最互补的。共轭体系在二聚体复合物中的堆叠相互作用对其稳定性的影响要小得多。在二聚体复合物中,染料的乙烯键是预先组织的,用于由可见光诱导的立体有规[2 + 2]光环加成(PCA)。PCA仅产生rctt含双皇冠的环丁烷衍生物的异构体。通过X射线衍射研究了染料。发现二聚体排列也保持在结晶状态。证明了染料在单晶中发生拓扑化学PCA而不被破坏的可能性。显示了所获得的环丁烷衍生物的逆向PCA制得起始染料的可能性。阐
New Synthesis of Formylbenzoazacrown Ethers
作者:S. N. Dmitrieva、O. V. Tikhonova、S. P. Gromov
DOI:10.1007/s11178-005-0352-2
日期:2005.9
A new procedure has been developed for the synthesis of formyl-substituted benzoazacrown ethers via cyclization of halogen derivatives of aza podands by the action of sodium hydride.
Photoinduced hydrogen-bonded self-assembly of cation-capped complexes and novel photoswitchable supramolecular devices based on (aza)-18-crown-6-containing styryl dyes bearing a long <i>N</i>-ammonioalkyl substituent
作者:Sergey P. Gromov、Timofey P. Martyanov、Artem I. Vedernikov、Svetlana N. Dmitrieva、Dmitry V. Kondratuk、Artem P. Vorozhtsov、Evgeny N. Ushakov
DOI:10.1039/d3nj02877a
日期:——
type are capable of self-assembly in MeCN to form dimeric complexes, which have a pseudocyclic structure owing to double intermolecular ammonium cation–crown ether interactions via hydrogen bonds; the dimerization equilibrium constants were measured. It was shown that photoinduced Z-isomers of the dyes are capable of intramolecular complex formation between the ammonium cation and the crown ether moiety;
New approach to the synthesis of benzoazacrown ethers
作者:S. P. Gromov、A. I. Vedernikov、S. N. Dmitriev
DOI:10.1007/bf02496032
日期:1999.6
Synthesis, Structure, and Characterization of Chromo(fluoro)ionophores with Cation-Triggered Emission Based on <i>N</i>-Methylaza-Crown-Ether Styryl Dyes
作者:Sergey P. Gromov、Svetlana N. Dmitrieva、Artem I. Vedernikov、Nikolay A. Kurchavov、Lyudmila G. Kuz’mina、Sergey K. Sazonov、Yuri A. Strelenko、Michael V. Alfimov、Judith A. K. Howard、Evgeny N. Ushakov
DOI:10.1021/jo401555a
日期:2013.10.4
Novel 2-benzothiazole-, 4-pyridine-, and 2- and. 4-quinoline-based styryl dyes containing an N-methylbenzoa-za-15(18)-crown-5(6)-ether moiety were synthesized. A detailed electronic spectroscopy study revealed high performance of these compounds as optical molecular sensors for alkali and alkaline-earth metal cations. They were shown to considerably surpass analogous chromoionophores based on N-phenylaza-crown ethers regarding both the ionochromism and the cation-binding ability. In addition, they act as fluorescent sensors for the metal cations by demonstrating cation-triggered emission. Upon complexation with Ba2+, the fluorescence enhancement factor reaches 61. The structural features of dyes and their metal complexes were studied by NMR spectroscopy diffraction. The high degree of macrocycle preorganization was found to be one of the factors determining the high cation binding ability of the sensor molecules based on N-methylbenzoaza-crown ethers. and X-ray