A switching sensor of C H bond breakage/formation regulated by mediating copper (II)’s complexation

Zhou, Xue; Li, Gang; Yang, Peng; Zhao, Liang; Deng, Tuo; Shen, Hongyan; Yang, Zhaozheng; Tian, Zhangmin; Chen, Yan

doi:10.1016/j.snb.2016.10.130

Cited by 20 publications

(8 citation statements)

References 29 publications

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“…Due to the electronic repulsion of the oxygen atoms of 2,7‐dimethoxyl groups of neighbors’ carbazolyl moieties of 2 , the former case would be more possible. That was, the unbound/free 2 adopted a distorted partial cone (or saddle) conformation, which had also been suggested by other groups’ works and our own …”

Section: Resultssupporting

confidence: 86%

Supramolecular Recognition of Three Way Junction DNA by a Cationic Calix[3]carbazole

Yang

Chen

et al. 2018

Chemistry A European J

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DNA three-way junctions (TWJ-DNA) are intermediate structures in DNA replication and/or recombination. They play very important roles in biological processes, but more subtle functions are still unknown due partially to the lack of a fluorescent ligand. In this study, a cationic calix[3]carbazole (2) has been synthesized and its properties of interacting with TWJ-DNA have been evaluated by UV/Vis and fluorescence spectroscopy, circular dichroism (CD), gel electrophoresis, and H NMR studies. The results show that 2 binds to the central hydrophobic cavity of TWJ-DNA. Moreover, it could selectively bind to TWJ-DNA over duplex and quadruplex DNA. Furthermore, 2 possesses the capability of serving as the TWJ-DNA probe as its trap-II excimer emission is turned on by TWJ-DNA.

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Section: Resultssupporting

confidence: 86%

Supramolecular Recognition of Three Way Junction DNA by a Cationic Calix[3]carbazole

Yang

Chen

et al. 2018

Chemistry A European J

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“…In nature, proteins utilize π-electrons of the indole moiety of Trp to interact with Cu 2+ . Another group 12 and our experiences 13 show that both methoxyl groups and π-electrons of carbazole units can bind to Cu 2+ . If the 6,12-methoxylderived C 2 -symmetric indolo [3,2-b]carbazole moiety of cub- [4]indolocarbazole could be viewed as either a double indole or a double carbazole derivative with a middle shared benzene ring, it might be able to interact with Cu 2+ .…”

mentioning

confidence: 79%

“…was synthesized based on the reference (SI), 11 and its cyclization was catalyzed by FeCl 3 • 6H 2 O to give cub [4]indolocarbazole (Scheme 1). All the compounds had been fully characterized by 1 H NMR, 13 C NMR, and HRMS spectra (Figures S1−S24 was ∼40% due possibly to a somewhat present template effect. 6 Using FeCl 3• 6H 2 O as the catalyst, the yield of the cyclic tetramers became lower in chloroform but was similar in dichloroethane.…”

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confidence: 99%

“…This indicated that both carbonyl and methoxyl O atoms as well as π-electrons got involved in Cu 2+ binding whereas the O atoms of the ether bond of the 2-(2-methoxyethoxy)ethyl acetate substitutes were less likely to interact with Cu 2+ . The dark gelatum-like precipitation of host−Cu 2+ binding (Figure S63a), and the EPR spectra 13,14 (Figure S63b) indicated the existence of radicals, accounting for the disappeared aromatic protons in Figure S62.…”

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confidence: 99%

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N-Embedded Cubarene: A Quadrangular Member of the Macrocycle Family

Zhang

Sun

et al. 2023

Org. Lett.

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Despite the large number of synthetic macrocycles, the cubarenes, the quadrangular-shaped macrocyclic arenes, remain less investigated, possibly due either to synthetic challenges or to the lack of suitable building blocks. In this paper, a N-embedded cubarene (cub[4]indolocarbazole) is facilely synthesized by FeCl 3 •6H 2 O-catalyzed cyclization in dichloromethane. The endo cavity of cub[4]indolocarbazole can bury quaternary ammonium salts in an intramolecular manner, whereas the intermolecular interaction between its exo walls with Cu 2+ generates two-dimensional supramolecular tessellation.

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“…With regard to the detection applications of ECCSs, the dual-signal-ratiometric output is superior to a single-signal output. [199][200][201][202] The ratiometry of dual signals is independent of the contents of the sensors and reagents, providing an intrinsic built-in correction to conquer the potentially adverse effects of the sensing systems and background signals. [203][204][205][206] Generally, to acquire the accurate intensity of a single signal is difficult in the sensing process of targets.…”

Section: Further Exploration Of Potential Applicationsmentioning

confidence: 99%

Preparation and applications of electrochemical chemosensors based on carbon-nanomaterial-modified molecularly imprinted polymers

2019

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The past few decades have witnessed a rapid development in electrochemical chemosensors (ECCSs). The integration of carbon nanomaterials (CNMs) and molecularly imprinted polymers (MIPs) has endowed ECCSs with high selectivity and sensitivity toward target detection. Due to the integrated merits of MIPs and CNMs, CNM-modified MIPs as ECCSs have been widely reported and have excellent detection applications. This review systematically summarized the general categories, preparation strategies, and applications of ECCSs based on CNM-modified MIPs. The categories include CNM-modified MIPs often hybridized with various materials and CNM-encapsulated or CNM-combined imprinting silica and polymers on working electrodes or other substrates. The preparation strategies include the polymerization of MIPs on CNM-modified substrates, co-polymerization of MIPs and CNMs on substrates, drop-casting of MIPs on CNM-modified substrates, self-assembly of CNMs/MIP complexes on substrates, and so forth. We discussed the in situ polymerization, electro-polymerization, and engineering structures of CNM-modified MIPs. With regard to potential applications, we elaborated the detection mechanisms, signal transducer modes, target types, and electrochemical sensing of targets in real samples. In addition, this review discussed the present status, challenges, and prospects of CNMmodified MIP-based ECCSs. This comprehensive review is desirable for scientists from broad research fields and can promote the further development of MIP-based functional materials, CNM-based hybrid materials, advanced composites, and hybrid materials.

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A switching sensor of C H bond breakage/formation regulated by mediating copper (II)’s complexation

Cited by 20 publications

References 29 publications

Supramolecular Recognition of Three Way Junction DNA by a Cationic Calix[3]carbazole

Supramolecular Recognition of Three Way Junction DNA by a Cationic Calix[3]carbazole

N-Embedded Cubarene: A Quadrangular Member of the Macrocycle Family

Preparation and applications of electrochemical chemosensors based on carbon-nanomaterial-modified molecularly imprinted polymers

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