Pub Date : 2025-12-06DOI: 10.31635/ccschem.025.202506602
Rui Gao, Zhen Liu, Xueli Liu, Yaqiong Wang, Xuyang He, Yang Li, Meixian Li, Yi Qiu, Jie Su, Liangbing Gan
Chloride recognition systems usually employ H-bonding with OH, NH, and CH groups and/or planar electron deficient π-molecules. The present work reports the first open-cage fullerene derivative (Buckybowl) capable of encapsulating chloride anion selectively. Single crystal X-ray diffraction analysis and theoretical calculations reveal that the encapsulated chloride forms strong H-bonding with the hydroxyl group directly above the orifice, in addition to strong interactions with the electron deficient spherical π-system. All other common anions including fluoride, iodide, and di- and polyatomic anions cannot enter the cavity of this open-cage fullerene derivative except for the bromide anion. Competitive encapsulation experiments with equimolar chloride and bromide mixtures demonstrate a remarkable 94:6 selectivity ratio in favor of chloride. Reversible hydration/dehydration of a carbonyl group along the rim of the 17-membered orifice serves as a chemical switch regulating transitions between open and closed states. The encapsulated chloride/bromide anion can be released upon dehydration to form the open state, followed by interaction with a silver cation. Alternatively, structural modification through 1,2-benzenediamine-mediated orifice expansion provides another pathway for halide release.
{"title":"Selective Encapsulation and Controlled Release of Chloride via a Buckybowl-Based Molecular Container","authors":"Rui Gao, Zhen Liu, Xueli Liu, Yaqiong Wang, Xuyang He, Yang Li, Meixian Li, Yi Qiu, Jie Su, Liangbing Gan","doi":"10.31635/ccschem.025.202506602","DOIUrl":"https://doi.org/10.31635/ccschem.025.202506602","url":null,"abstract":"Chloride recognition systems usually employ H-bonding with OH, NH, and CH groups and/or planar electron deficient π-molecules. The present work reports the first open-cage fullerene derivative (Buckybowl) capable of encapsulating chloride anion selectively. Single crystal X-ray diffraction analysis and theoretical calculations reveal that the encapsulated chloride forms strong H-bonding with the hydroxyl group directly above the orifice, in addition to strong interactions with the electron deficient spherical π-system. All other common anions including fluoride, iodide, and di- and polyatomic anions cannot enter the cavity of this open-cage fullerene derivative except for the bromide anion. Competitive encapsulation experiments with equimolar chloride and bromide mixtures demonstrate a remarkable 94:6 selectivity ratio in favor of chloride. Reversible hydration/dehydration of a carbonyl group along the rim of the 17-membered orifice serves as a chemical switch regulating transitions between open and closed states. The encapsulated chloride/bromide anion can be released upon dehydration to form the open state, followed by interaction with a silver cation. Alternatively, structural modification through 1,2-benzenediamine-mediated orifice expansion provides another pathway for halide release.","PeriodicalId":9810,"journal":{"name":"CCS Chemistry","volume":"1 1","pages":"1-10"},"PeriodicalIF":11.2,"publicationDate":"2025-12-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145717409","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2025-12-02DOI: 10.31635/ccschem.025.202506884
Yuhan Liu, Shujie Ji, Jian Wang
Herein, we disclosed a new light-driven organocatalytic enantioselective radical α-carbamoylation of amines. The method involves the key asymmetric coupling of carbene-bound alkoxycarbonyl radicals with α-amino radicals, featuring with moderate to good yields and high enantioselectivities. The protocol can be utilized for the rapid preparation of various chiral α-amino acids, including primary, secondary, or tertiary amine motifs.
{"title":"Light-driven Organocatalytic Enantioselective Radical α-Carbamoylation of Amines","authors":"Yuhan Liu, Shujie Ji, Jian Wang","doi":"10.31635/ccschem.025.202506884","DOIUrl":"https://doi.org/10.31635/ccschem.025.202506884","url":null,"abstract":"Herein, we disclosed a new light-driven organocatalytic enantioselective radical α-carbamoylation of amines. The method involves the key asymmetric coupling of carbene-bound alkoxycarbonyl radicals with α-amino radicals, featuring with moderate to good yields and high enantioselectivities. The protocol can be utilized for the rapid preparation of various chiral α-amino acids, including primary, secondary, or tertiary amine motifs.","PeriodicalId":9810,"journal":{"name":"CCS Chemistry","volume":"1 4 1","pages":""},"PeriodicalIF":11.2,"publicationDate":"2025-12-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145680555","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2025-12-01DOI: 10.31635/ccschem.025.202505435
Ningchao Liu, Yoonji Choi, Zhaohui Zong, Tianming Feng, Taeyeon Kim, Xian-Sheng Ke
BF<sub>2</sub>-chelated dipyrromethenes (BODIPYs) were integrated into cycloparaphenylene (CPP) rings via two different connection modes for the first time. Single-crystal X-ray diffractions revealed that the 2,6-connected BODIPY-CPP ring (<b xmlns:bkstg="http://www.atypon.com/backstage-ns" xmlns:fn="http://www.w3.org/2005/xpath-functions" xmlns:pxje="java:com.atypon.frontend.services.impl.PassportXslJavaExtentions" xmlns:urlutil="java:com.atypon.literatum.customization.UrlUtil" xmlns:xlink="http://www.w3.org/1999/xlink">