BROWSE

Related Scientist

Kim, Ki Moon's photo.

Kim, Ki Moon
복잡계 자기조립 연구단
more info

ITEM VIEW & DOWNLOAD

Binding of alpha,omega-alkyldiammonium ions by cucurbit[n]urils in the gas phase

Cited 3 time in webofscience Cited 3 time in scopus
1,478 Viewed 622 Downloaded
Title
Binding of alpha,omega-alkyldiammonium ions by cucurbit[n]urils in the gas phase
Author(s)
Yang, F; Jones, CA; Selvapalam, N; Young Ho Ko; Ki Moon Kim; Dearden, DV
Subject
cucurbituril, ; alkyldiamine, ; mass spectrometry, ; collision-induced dissociation
Publication Date
2014-09
Journal
SUPRAMOLECULAR CHEMISTRY, v.26, no.9, pp.684 - 691
Publisher
TAYLOR & FRANCIS LTD
Abstract
We investigated gas-phase complexes of a,v-n-alkyldiammonium ions with cucurbit[5]uril (CB[5]), decamethylcucurbit[5] uril (mc5), penta(cyclohexyl)cucurbit[5]uril (CB*[5]), hexa(cyclohexyl)cucurbit[6]uril (CB*[6]), cucurbit[7]uril (CB[7]) and cucurbit[8]uril (CB[8]) using electrospray Fourier transform ion cyclotron resonance mass spectrometry and collisioninduced dissociation techniques. The five-membered cucurbit[n]urils (CB[n]s) form singly charged 1:1 and doubly charged 2:1 diamine:CB[n] complexes. All dissociate via loss of neutral a,v-n-alkyldiamine with only weak dependence of dissociation thresholds on chain length. For a given diamine, threshold energies are in the order CB[5] , mc5 , CB*[5]. This is consistent with guest hydrogen bonding on the portals of the CB[5]s with no threading into the host’s interior. The n $ 6 CB[n]s form 1:1 complexes with doubly protonated a,v-n-alkyldiamines. These collisionally dissociate via four channels: loss of singly protonated a,v-n-alkyldiammonium; fragmentation of the CB[n] cage; loss of neutral a,v-nalkyldiamine and fragmentation of the a,v-n-alkyldiamine. The dissociation threshold energies and branching ratios exhibit strong dependence on the length of the a,v-n-alkyldiamine and the size of the CB[n]. The data suggest that the optimum a, v-n-alkyldiamine length for binding CB*[6] is three to four methylene groups; for CB[7], four to five methylene groups and for CB[8], five to six methylene groups, indicating an increasing tendency for the guest to span the host cavity diagonally as the size of the CB[n] increases.
URI
https://pr.ibs.re.kr/handle/8788114/923
DOI
10.1080/10610278.2014.930149
ISSN
1061-0278
Appears in Collections:
Center for Self-assembly and Complexity(복잡계 자기조립 연구단) > 1. Journal Papers (저널논문)
Files in This Item:
Yang_Supramol_Chem_2014_26684.pdfDownload

qrcode

  • facebook

    twitter

  • Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.
해당 아이템을 이메일로 공유하기 원하시면 인증을 거치시기 바랍니다.

Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.

Browse