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Search for "cucurbituril" in Full Text gives 12 result(s) in Beilstein Journal of Organic Chemistry.

Light-responsive rotaxane-based materials: inducing motion in the solid state

  • Adrian Saura-Sanmartin

Beilstein J. Org. Chem. 2023, 19, 873–880, doi:10.3762/bjoc.19.64

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  • cyclobutanes (Figure 4b). Interestingly, the changes in the crystalline array as a consequence of this photodimerization within the cucurbituril macrocycles also induced a macroscopic deformation of the metal-organic material, promoting a photomechanical bending of the crystals. This photomechanical
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Published 14 Jun 2023

Study on the interactions between melamine-cored Schiff bases with cucurbit[n]urils of different sizes and its application in detecting silver ions

  • Jun-Xian Gou,
  • Yang Luo,
  • Xi-Nan Yang,
  • Wei Zhang,
  • Ji-Hong Lu,
  • Zhu Tao and
  • Xin Xiao

Beilstein J. Org. Chem. 2021, 17, 2950–2958, doi:10.3762/bjoc.17.204

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  • host–guest interactions. Among them, Q[7]-TBT is selected as a UV detector for the detection of silver ions (Ag+). This work makes full use of the characteristics of each cucurbituril and melamine-cored Schiff base to construct a series of complexes and these are applied to metal detection. Keywords
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Published 17 Dec 2021

Synthesis of a novel aminobenzene-containing hemicucurbituril and its fluorescence spectral properties with ions

  • Qingkai Zeng,
  • Qiumeng Long,
  • Jihong Lu,
  • Li Wang,
  • Yuting You,
  • Xiaoting Yuan,
  • Qianjun Zhang,
  • Qingmei Ge,
  • Hang Cong and
  • Mao Liu

Beilstein J. Org. Chem. 2021, 17, 2840–2847, doi:10.3762/bjoc.17.195

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  • . Hemicucurbit[n]urils (HQ[n]) and relevant derivatives [24] represent as a sub-group of the cucurbituril family [25], possessing much more flexible structures than Q[n]s, and are generally characterized by an electroneutral cavity and a negative electro-potential portal. Comparing the coordination properties of
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Letter
Published 06 Dec 2021

Insight into functionalized-macrocycles-guided supramolecular photocatalysis

  • Minzan Zuo,
  • Krishnasamy Velmurugan,
  • Kaiya Wang,
  • Xueqi Tian and
  • Xiao-Yu Hu

Beilstein J. Org. Chem. 2021, 17, 139–155, doi:10.3762/bjoc.17.15

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  • of electron–hole pairs. Consequently, a high activity of TiO2 could be achieved, and the decolorization of methyl orange was realized efficiently. Cucurbituril-based photocatalysis CBs are a type of macrocyclic molecules made of glycoluril linked by methylene bridges. The name is derived from the
  • molecules, binary 1:1 or ternary 1:1:1 complexes can be formed. In view of the unique host–guest binding characteristics, cucurbituril is also often used to construct photocatalytic systems [39][40][41]. The large and hydrophobic cavities of the CBs provide a suitable environment for various photochemical
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Review
Published 18 Jan 2021

NMR Spectroscopy of supramolecular chemistry on protein surfaces

  • Peter Bayer,
  • Anja Matena and
  • Christine Beuck

Beilstein J. Org. Chem. 2020, 16, 2505–2522, doi:10.3762/bjoc.16.203

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  • ]arene has been titrated to trimethyl-lysine (KMe3), which yields the largest shifts and most severe line broadening for the methyl protons and Hε resonances, indicating that these atoms are located inside the aromatic bowl of the calixarene [29]. The binding affinities of cucurbituril ligands for
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Published 09 Oct 2020

Morphology-tunable and pH-responsive supramolecular self-assemblies based on AB2-type host–guest-conjugated amphiphilic molecules for controlled drug delivery

  • Yang Bai,
  • Cai-ping Liu,
  • Di Chen,
  • Long-hai Zhuo,
  • Huai-tian Bu and
  • Wei Tian

Beilstein J. Org. Chem. 2019, 15, 1925–1932, doi:10.3762/bjoc.15.188

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  • stimuli-responsive supramolecular self-assemblies with regulated self-assembly morphologies due to their response to various external stimuli, such as temperature [12], light [13][14][15], redox [16][17][18], and pH [19][20]. In addition, β-cyclodextrin (β-CD), pillararene and cucurbituril have been
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Published 13 Aug 2019

Tetrathiafulvalene – a redox-switchable building block to control motion in mechanically interlocked molecules

  • Hendrik V. Schröder and
  • Christoph A. Schalley

Beilstein J. Org. Chem. 2018, 14, 2163–2185, doi:10.3762/bjoc.14.190

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  • example, the π-electron-rich wheel 8, consisting of two doubly-bridged 1,5-dioxynaphthalenes, is able to form a donor–acceptor complex with the π-electron-poor TTF2+ dication [26]. An astonishing discovery regarding TTF–cucurbituril complexes was made by Kim and co-workers in 2004 (Figure 7) [67]. The
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Published 20 Aug 2018

Rational design of boron-dipyrromethene (BODIPY) reporter dyes for cucurbit[7]uril

  • Mohammad A. Alnajjar,
  • Jürgen Bartelmeß,
  • Robert Hein,
  • Pichandi Ashokkumar,
  • Mohamed Nilam,
  • Werner M. Nau,
  • Knut Rurack and
  • Andreas Hennig

Beilstein J. Org. Chem. 2018, 14, 1961–1971, doi:10.3762/bjoc.14.171

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  • . This includes indicator displacement assays with favourable absorption and emission wavelengths in the visible spectral region, fluorescence correlation spectroscopy, and noncovalent surface functionalization with fluorophores. Keywords: BODIPY; cucurbituril; fluorescence; pH; photoinduced electron
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Published 30 Jul 2018

Interactions between photoacidic 3-hydroxynaphtho[1,2-b]quinolizinium and cucurbit[7]uril: Influence on acidity in the ground and excited state

  • Jonas Becher,
  • Daria V. Berdnikova,
  • Darinka Dzubiel,
  • Heiko Ihmels and
  • Phil M. Pithan

Beilstein J. Org. Chem. 2017, 13, 203–212, doi:10.3762/bjoc.13.23

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  • effect of the ligand–CB[n] interplay may be used to modify and control the photochemical properties of a guest molecule [8][9]. For instance, the encapsulation of photoactive molecules in the constrained medium of a cucurbituril cavity enables the performance of chemo-, regio- or stereoselective
  • interactions, whereas the linear phene-type derivatives bind with lesser, but still significant affinity. Considering the size of the cucurbituril host, it may be assumed that the angular molecules experience steric repulsion with the outer-rim carbonyl groups, which does not occur with the linear molecules
  • equilibrium to a different extend depending on the ligand structure [54]. Remarkably, the pKa and pKa* values of compound 2 increase by about two to three orders of magnitude, respectively, when bound to CB[7]. Although the change of ground state pKa values of acids on association with cucurbituril hosts is
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Published 01 Feb 2017

Topochemical control of the photodimerization of aromatic compounds by γ-cyclodextrin thioethers in aqueous solution

  • Hai Ming Wang and
  • Gerhard Wenz

Beilstein J. Org. Chem. 2013, 9, 1858–1866, doi:10.3762/bjoc.9.217

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  • 15 mM aqueous solution of COU proceeded with a low quantum yield Φ = 0.11% and afforded mainly the syn-HH isomer with a reasonable selectivity of syn/anti = 10, as previously described [38][39]. Photodimerization of 6-methyl-COU complexed in cucurbituril CB [8] furnished the syn-HT isomer as the main
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Published 12 Sep 2013

Structures of the reaction products of the AZADO radical with TCNQF4 or thiourea

  • Hideto Suzuki,
  • Yuta Kawahara,
  • Hiroki Akutsu,
  • Jun-ichi Yamada and
  • Shin’ichi Nakatsuji

Beilstein J. Org. Chem. 2013, 9, 1487–1491, doi:10.3762/bjoc.9.169

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  • host molecules such as tris(o-phenylenedioxy)cyclotriphosphazene (TPP) [10], cyclodextrin (CD) [11], or cucurbituril (CB) derivatives [12] but the inclusion compound derived from AZADO is still unknown. Here in this paper we wish to report the apparent difference of reactivity between AZADO (2) and
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Letter
Published 25 Jul 2013

Molecular recognition of organic ammonium ions in solution using synthetic receptors

  • Andreas Späth and
  • Burkhard König

Beilstein J. Org. Chem. 2010, 6, No. 32, doi:10.3762/bjoc.6.32

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Published 06 Apr 2010
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