The story of the little blue box: a tribute to Siegfried Hünig

XY Chen, H Chen… - Angewandte Chemie …, 2023 - Wiley Online Library
The tetracationic cyclophane, cyclobis (paraquat‐p‐phenylene), also known as the little blue
box, constitutes a modular receptor that has facilitated the discovery of many host–guest …

Recent advances of stimuli-responsive viologen-based nanocomposites

X Li, J Yang, YW Yang - Materials Chemistry Frontiers, 2023 - pubs.rsc.org
The unique electron-deficient viologen-based compounds are the terminally substituted 4,
4′-bipyridine with excellent photoelectric response features to be applied in the …

The green box: Selenoviologen-based tetracationic cyclophane for electrochromism, host–guest interactions, and visible-light photocatalysis

Y Li, N Li, G Li, Y Qiao, M Zhang, L Zhang… - Journal of the …, 2023 - ACS Publications
The novel selenoviologen-based tetracationic cyclophanes (green boxes 3 and 5) with rigid
electron-deficient cavities are synthesized via SN2 reactions in two steps. The green boxes …

Cooperative binding and chirogenesis in an expanded perylene bisimide cyclophane

DP Sukumaran, K Shoyama, RK Dubey… - Journal of the …, 2024 - ACS Publications
The encapsulation of more than one guest molecule into a synthetic cavity is a highly
desirable yet a highly challenging task to achieve for neutral supramolecular hosts in …

Stable Crystalline Nanohoop Radical and Its Self‐Association Promoted by van der Waals Interactions

B Hou, K Li, H He, J Hu, Z Xu, Q Xiang… - Angewandte Chemie …, 2023 - Wiley Online Library
A stable nanohoop radical (OR3) combining the structures of cycloparaphenylene and an
olympicenyl radical is synthesized and isolated in the crystalline state. X‐ray …

Isomerization-induced fluorescence enhancement of two new viologen derivatives: mechanism insight and DFT calculations

X Yin, X Li, X Li, M Biczysko, S Zhu, J Xu, YL Bai - Chemical Science, 2023 - pubs.rsc.org
The dark-colored viologen radical cations are unstable in air and easily fade, thus greatly
limiting their applications. If a suitable substituent is introduced into the structure, it will have …

Radical-Driven Crystal–Amorphous–Crystal Transition of a Metal–Organic Framework

S Park, J Lee, B Kim, CY Jung, SE Bae… - Journal of the …, 2024 - ACS Publications
Self-assembly-based structural transition has been explored for various applications,
including molecular machines, sensors, and drug delivery. In this study, we developed new …

Harnessing Radicals: Advances in Self‐Assembly and Molecular Machinery

CK Lee, C Gangadharappa… - Advanced …, 2024 - Wiley Online Library
Radicals, with their unpaired electrons, exhibit unique chemical and physical properties that
have long intrigued chemists. Despite early skepticism about their stability, the discovery of …

Chalcogenoviologen Enhanced Host–Guest Recognition

Y Feng, X Zhao, DA Appleton, H Han… - CCS …, 2024 - chinesechemsoc.org
In the field of supramolecular chemistry, cyclophanes with novel properties are highly sought
after since they can be tailored to fulfill specific tasks. In this article, we incorporate …

Host‐Guest Stimuli‐Responsive Click Chemistry

A Blanco‐Gómez, M Díaz‐Abellás… - … A European Journal, 2024 - Wiley Online Library
Click chemistry has reached its maturity as the weapon of choice for the irreversible ligation
of molecular fragments, with over 20 years of research resulting in the development or …