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Perera S, Shaurya A, Baptiste M, Zavalij PY, Isaacs L. Acyclic Cucurbit[n]uril Receptors Function as Solid State Sequestrants for Organic Micropollutants. Angew Chem Int Ed Engl 2024; 63:e202407169. [PMID: 38661568 DOI: 10.1002/anie.202407169] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2024] [Revised: 04/24/2024] [Accepted: 04/25/2024] [Indexed: 04/26/2024]
Abstract
The accumulation of organic micropollutants (OMP) in aquatic systems is a major societal problem that can be addressed by approaches including nanofiltration, flocculation, reverse osmosis and adsorptive methods using insoluble materials (e.g. activated carbon, MOFs, nanocomposites). More recently, polymeric versions of supramolecular hosts (e.g. cyclodextrins, calixarenes, pillararenes) have been investigated as OMP sequestrants. Herein, we report our study of the use of water insoluble dimethylcatechol walled acyclic cucurbit[n]uril (CB[n]) hosts as solid state sequestrants for a panel of five OMPs. A series of hosts (H1-H4) were synthesized by reaction of glycoluril oligomer (monomer-tetramer) with 3,6-dimethylcatechol and fully characterized by spectroscopic means and x-ray crystallography. The solid hosts sequester OMPs from water with removal efficiencies exceeding 90 % in some cases. The removal efficiencies of the new hosts parallel the known molecular recognition properties of analogous water soluble acyclic CB[n]. OMP uptake by solid host occurs rapidly (≈120 seconds). Head-to-head comparison with CB[6] in batch-mode separation and DARCO activated carbon in flow-through separation mode show that tetramer derived host (H4) performs very well under identical conditions. The work establishes insoluble acyclic CB[n]-type receptors as a promising new platform for OMP sequestration.
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Affiliation(s)
- Suvenika Perera
- Department of Chemistry and Biochemistry, University of Maryland, College Park, 8051 Regents Dr., College Park, MD 20742, United States
| | - Alok Shaurya
- Department of Chemistry and Biochemistry, University of Maryland, College Park, 8051 Regents Dr., College Park, MD 20742, United States
| | - Michael Baptiste
- Department of Chemistry and Biochemistry, University of Maryland, College Park, 8051 Regents Dr., College Park, MD 20742, United States
| | - Peter Y Zavalij
- Department of Chemistry and Biochemistry, University of Maryland, College Park, 8051 Regents Dr., College Park, MD 20742, United States
| | - Lyle Isaacs
- Department of Chemistry and Biochemistry, University of Maryland, College Park, 8051 Regents Dr., College Park, MD 20742, United States
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2
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Zhang S, Chen L, Zhou C, Gao C, Yang J, Liao X, Yang B. Supramolecular fluorescent probe based on acyclic cucurbituril for detection of cancer Labels in human urine. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2023; 294:122515. [PMID: 36842211 DOI: 10.1016/j.saa.2023.122515] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/06/2022] [Revised: 02/14/2023] [Accepted: 02/15/2023] [Indexed: 06/18/2023]
Abstract
Spermine (Spm) and spermidine (Spmd) are considered as potential biomarker for early diagnosis of human cancer. Herein, a novel acyclic cucurbituril derivative (UL-ACB) was firstly designed and synthesized, which fluoresces at 460 nm after excitation at 365 nm. UL-ACB is rich in oxygen atoms which are capable of forming coordinate bonds with copper (Cu2+) that cause quenching of UL-ACB fluorescence. Moreover, the addition of biological endogenous substances Spm and Spmd can turn on fluorescence of UL-ACB. Interestingly, the probe showed a remarkable detection efficiency for Spm and Spmd in human urine (the detection limits of Spm and Spmd were 0.156 μM and 0.762 μM, and the linear ranges are 0.156 ∼ 43.06 μM and 0.762 ∼ 29.10 μM), which completely covered the early diagnosis of urinary Spm (1 ∼ 10 μM) and urine Spmd (1 ∼ 20 μM) required concentration range in cancer patients. The probe for Spm and Spmd is simple, time-saving and selective, which may provide a new promising strategy for early cancer diagnosis.
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Affiliation(s)
- Shuqing Zhang
- Faculty of Life Science and Technology, Kunming University of Science and Technology, Kunming 650500, PR China
| | - Liyuan Chen
- Faculty of Life Science and Technology, Kunming University of Science and Technology, Kunming 650500, PR China
| | - Chao Zhou
- Faculty of Life Science and Technology, Kunming University of Science and Technology, Kunming 650500, PR China
| | - Chuanzhu Gao
- Faculty of Life Science and Technology, Kunming University of Science and Technology, Kunming 650500, PR China
| | - Jing Yang
- Faculty of Life Science and Technology, Kunming University of Science and Technology, Kunming 650500, PR China
| | - Xiali Liao
- Faculty of Life Science and Technology, Kunming University of Science and Technology, Kunming 650500, PR China.
| | - Bo Yang
- Faculty of Life Science and Technology, Kunming University of Science and Technology, Kunming 650500, PR China.
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3
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Zhu P, Kong L, Zhang Y, Liu Q, Liao X, Song Y, Yang B. Synthetic transmembrane channel molecules formed by acyclic cucurbiturils and pillararene: tuning cation selectivity and generating membrane potential. J Mol Liq 2023. [DOI: 10.1016/j.molliq.2023.121198] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
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4
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Functional supramolecular micelles driven by the amphiphilic complex of biotin-acyclic cucurbituril and cannabidiol for cell-targeted drug delivery. Int J Pharm 2022; 625:122048. [PMID: 35902054 DOI: 10.1016/j.ijpharm.2022.122048] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2022] [Revised: 07/03/2022] [Accepted: 07/20/2022] [Indexed: 11/21/2022]
Abstract
Precise delivery of hydrophobic drugs has always been a great challenge for drug delivery systems. To overcome this problem, we designed and synthesized a novel supramolecular host biotin-acyclic cucurbituril (ACBB) at the first time, and we have developed a host-guest amphiphilic complex based on ACBB and amantadine-conjugated cannabinoids (AD-CBD) that self-assembles to form functionalized supramolecular micelles (FSMs) for cell-targeted drug delivery. The 1:1 stoichiometric ratio of the amphiphilic complex and its possible host-guest inclusion behaviors are obtained by fluorescence titration, nuclear magnetic resonance (NMR), Fourier transform-infrared spectroscopy (FT-IR) and thermal analysis (TGA and DSC). Using transmission electron microscope (TEM) and dynamic light scattering (DLS), we have observed that the shape of FSMs was spherical and size was 137-192 nm. In addition, MTT test results show that FSMs have good antitumor activity, taking MCF-7 as an example, the in vitro half-maximal inhibitory concentration (IC50) values of FSMs were 1.53 μM and 5.02 μM, which were better than 30.83 μM of cisplatin. Confocal laser scanning microscopy (CLSM) results showed that FSMs loaded with Rhodamine B can specifically aggregate on the surface of tumor cells and the targeting ability has been directly verified. Flow cytometry results showed that FSMs could promote tumor cell apoptosis. All results indicated that FSMs had high bioavailability, stability, accurate targeting and excellent delivery efficiency, which had great application potential in the field of drug delivery.
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5
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Preparation and recognition property of an acyclic cucurbit[n]uril dimer. J INCL PHENOM MACRO 2022. [DOI: 10.1007/s10847-022-01130-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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6
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Pavlović RZ, Lalisse RF, Hansen AL, Waudby CA, Lei Z, Güney M, Wang X, Hadad CM, Badjić JD. From Selection to Instruction and Back: Competing Conformational Selection and Induced Fit Pathways in Abiotic Hosts. Angew Chem Int Ed Engl 2021; 60:19942-19948. [PMID: 34125989 DOI: 10.1002/anie.202107091] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2021] [Indexed: 12/15/2022]
Abstract
Two limiting cases of molecular recognition, induced fit (IF) and conformational selection (CS), play a central role in allosteric regulation of natural systems. The IF paradigm states that a substrate "instructs" the host to change its shape after complexation, while CS asserts that a guest "selects" the optimal fit from an ensemble of preexisting host conformations. With no studies that quantitatively address the interplay of two limiting pathways in abiotic systems, we herein and for the first time describe the way by which twisted capsule M-1, encompassing two conformers M-1(+) and M-1(-), trap CX4 (X=Cl, Br) to give CX4 ⊂M-1(+) and CX4 ⊂M-1(-), with all four states being in thermal equilibrium. With the assistance of 2D EXSY, we found that CBr4 would, at its lower concentrations, bind M-1 via a M-1(+)→M-1(-)→CBr4 ⊂M-1(-) pathway corresponding to conformational selection. For M-1 complexing CCl4 though, data from 2D EXSY measurements and 1D NMR line-shape analysis suggested that lower CCl4 concentrations would favor CS while the IF pathway prevailed at higher proportions of the guest. Since CS and IF are not mutually exclusive, we reason that our work sets the stage for characterizing the dynamics of a wide range of already existing hosts to broaden our fundamental understanding of their action. The objective is to master the way in which encapsulation takes place for designing novel and allosteric sequestering agents, catalysts and chemosensors akin to those found in nature.
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Affiliation(s)
- Radoslav Z Pavlović
- Department of Chemistry & Biochemistry, The Ohio State University, 100 West 18th Avenue, Columbus, OH, 43210, USA
| | - Remy F Lalisse
- Department of Chemistry & Biochemistry, The Ohio State University, 100 West 18th Avenue, Columbus, OH, 43210, USA
| | - Alexandar L Hansen
- Campus Chemical Instrument Center, The Ohio State University, 100 West 18th Avenue, Columbus, OH, 43210, USA
| | - Christopher A Waudby
- Institute of Structural and Molecular Biology, University College London, London, WC1E 6BT, UK
| | - Zhiquan Lei
- Department of Chemistry & Biochemistry, The Ohio State University, 100 West 18th Avenue, Columbus, OH, 43210, USA
| | - Murat Güney
- Agri Ibrahim Çeçen University, Department of Chemistry, 04100, Agri, Turkey
| | - Xiuze Wang
- Department of Chemistry & Biochemistry, The Ohio State University, 100 West 18th Avenue, Columbus, OH, 43210, USA
| | - Christopher M Hadad
- Department of Chemistry & Biochemistry, The Ohio State University, 100 West 18th Avenue, Columbus, OH, 43210, USA
| | - Jovica D Badjić
- Department of Chemistry & Biochemistry, The Ohio State University, 100 West 18th Avenue, Columbus, OH, 43210, USA
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7
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Pavlović RZ, Lalisse RF, Hansen AL, Waudby CA, Lei Z, Güney M, Wang X, Hadad CM, Badjić JD. From Selection to Instruction and Back: Competing Conformational Selection and Induced Fit Pathways in Abiotic Hosts. Angew Chem Int Ed Engl 2021. [DOI: 10.1002/ange.202107091] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Affiliation(s)
- Radoslav Z. Pavlović
- Department of Chemistry & Biochemistry The Ohio State University 100 West 18th Avenue Columbus OH 43210 USA
| | - Remy F. Lalisse
- Department of Chemistry & Biochemistry The Ohio State University 100 West 18th Avenue Columbus OH 43210 USA
| | - Alexandar L. Hansen
- Campus Chemical Instrument Center The Ohio State University 100 West 18th Avenue Columbus OH 43210 USA
| | - Christopher A. Waudby
- Institute of Structural and Molecular Biology University College London London WC1E 6BT UK
| | - Zhiquan Lei
- Department of Chemistry & Biochemistry The Ohio State University 100 West 18th Avenue Columbus OH 43210 USA
| | - Murat Güney
- Agri Ibrahim Çeçen University Department of Chemistry 04100 Agri Turkey
| | - Xiuze Wang
- Department of Chemistry & Biochemistry The Ohio State University 100 West 18th Avenue Columbus OH 43210 USA
| | - Christopher M. Hadad
- Department of Chemistry & Biochemistry The Ohio State University 100 West 18th Avenue Columbus OH 43210 USA
| | - Jovica D. Badjić
- Department of Chemistry & Biochemistry The Ohio State University 100 West 18th Avenue Columbus OH 43210 USA
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8
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Cheng M, Isaacs L. Acyclic Cucurbituril Featuring Pendant Cyclodextrins. Supramol Chem 2021; 33:53-62. [PMID: 34305377 PMCID: PMC8294166 DOI: 10.1080/10610278.2021.1927033] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/02/2021] [Accepted: 05/01/2021] [Indexed: 12/22/2022]
Abstract
We report the design and synthesis of the acyclic cucurbit[n]uril-β-cyclodextrin chimeric host H1. The goal of the study is to deepen the cavity of the receptor to allow β-CD complexation of moieties on the guest (especially fentanyl) that protrude from the cavity of the primary acyclic CB[n] binding site to enhance binding affinity and deliver new supramolecular antidotes for fentanyl intoxication. 1H NMR spectroscopy was used to deduce the geometry of the complexes between H1 and H2 and the guest panel (G1 - G8 and fentanyl) whereas isothermal titration calorimetry was used to determine the thermodynamic parameters of complexation. Hosts H1 and H2 retain the essential molecular recognition features of CB[n] receptors, but chimeric host H1 binds slightly stronger toward the guest panel than H2 for reasons that remain unclear. Compared to tetraanionic hosts M1 and M2, the dianionic hosts H1 and H2 are less potent receptors which reflects the importance of electrostatic (ion-ion and ion-dipole) interactions in this series of hosts. The work highlights the challenges inherent in the optimization of binding affinity of hosts as potential supramolecular antidotes.
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Affiliation(s)
- Ming Cheng
- Department of Chemistry and Biochemistry, University of Maryland, College Park, Maryland 20742, United States
| | - Lyle Isaacs
- Department of Chemistry and Biochemistry, University of Maryland, College Park, Maryland 20742, United States
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9
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Gentile D, Floresta G, Patamia V, Nicosia A, Mineo PG, Rescifina A. Cucurbit[7]uril as a catalytic nanoreactor for one-pot synthesis of isoxazolidines in water. Org Biomol Chem 2020; 18:1194-1203. [PMID: 31995083 DOI: 10.1039/c9ob02352f] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Abstract
The main objective of supramolecular chemistry is to mimic the macrosystems present in nature, a goal that fits perfectly with the green chemistry guidelines. The aim of our work is to use the hydrophobic cavity of cucurbit[7]uril (CB[7]) to mimic nature for performing different dehydration and cycloaddition reactions in water. The hydrophobic cavity of CB[7] made it possible to synthesize nitrones and isoxazolidines in a one-pot fashion using water as a reaction solvent. Substituted isoxazolidines were obtained from the cycloaddition of nitrones with various styrenes and cinnamates, under microwave irradiation, with a catalytic amount of CB[7], and a moderate increase in the formation of the trans adduct was observed, compared to the reaction being carried out in toluene. The mechanism of the reaction and the inclusion of reagents and products in the CB[7] cavity have been studied and rationalized by NMR spectroscopy, ESI-MS experiments, and molecular modeling calculations.
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Affiliation(s)
- Davide Gentile
- Dipartimento di Scienze del Farmaco, Università di Catania, Viale Andrea Doria 6, 95125 Catania, Italy. and Dipartimento di Scienze Chimiche, Università di Catania, Viale Andrea Doria 6, 95125 Catania, Italy
| | - Giuseppe Floresta
- Dipartimento di Scienze del Farmaco, Università di Catania, Viale Andrea Doria 6, 95125 Catania, Italy.
| | - Vincenzo Patamia
- Dipartimento di Scienze del Farmaco, Università di Catania, Viale Andrea Doria 6, 95125 Catania, Italy. and Dipartimento di Scienze Chimiche, Università di Catania, Viale Andrea Doria 6, 95125 Catania, Italy
| | - Angelo Nicosia
- Dipartimento di Scienze Chimiche, Università di Catania, Viale Andrea Doria 6, 95125 Catania, Italy
| | - Placido G Mineo
- Dipartimento di Scienze Chimiche, Università di Catania, Viale Andrea Doria 6, 95125 Catania, Italy and CNR-IPCB Istituto per i Polimeri, Compositi e Biomateriali, Via P. Gaifami 18, 95126 Catania, Italy and CNR-IPCF Istituto per i Processi Chimico-Fisici, Viale F. Stagno d'Alcontres 37, 98158 Messina, Italy
| | - Antonio Rescifina
- Dipartimento di Scienze del Farmaco, Università di Catania, Viale Andrea Doria 6, 95125 Catania, Italy. and Consorzio Interuniversitario Nazionale di ricerca in Metodologie e Processi Innovativi di Sintesi (C.I.N.M.P.S.), Via E. Orabona 4, 70125 Bari, Italy
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10
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Wang Y, Liu T, Jiang J, Chen Y, Cen M, Lu D, Cao L, Sun S, Yao Y. Syntheses of water-soluble acyclic naphthalene oligomers and their applications in water. Dalton Trans 2019; 48:6333-6336. [PMID: 30973550 DOI: 10.1039/c9dt00709a] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Water-soluble -CH2- bridged acyclic naphthalene oligomers (WN2 and WN3) were designed and prepared successfully. Interestingly, WN3 can be used in reversible dispersion of carbon nanotubes in water by changing the pH efficiently.
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Affiliation(s)
- Yang Wang
- College of Chemistry and Chemical Engineering, Nantong University, Nantong, Jiangsu 226019, P.R. China.
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11
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Abstract
Two acyclic CB[n]-type hosts (1 and 2) which possess four 2° or 3° amide arms are reported; 1 and 2 are slightly soluble in water and do not self-associate. Host 2 has four 3° amide arms that exist as a mixture of E- and Z-isomers. 1H NMR was used to qualitatively investigate the binding properties of 1 and 2 which indicates they retain the essential binding features of macrocyclic CB[n] hosts (e.g. cavity binding of hydrophobic residues and portal binding of cationic groups). We measured the Ka values of 1 and 2 toward guests 6 - 12, methamphetamine, and fentanyl by ITC to evaluate their potential as in vivo sequestration agents. Neutral hosts 1 and 2 bind less tightly than tetraanionic hosts M1, ACB1, and ACB2. We attribute the lower Ka values to the absence of secondary ion-ion (ammonium•••sulfonate or ammonium•••carboxylate) electrostatic interactions for host•guest complexes of 1 and 2. The secondary amide functionality on 1 decreases affinity by formation of intramolecular NH•••O=C H-bonds. Tertiary amide host 2 binds even more weakly than 1 due to backfolding of the amide N-CH3-groups of 2 into its own cavity. The x-ray crystal structure of 2 supports this conclusion.
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Affiliation(s)
- Weijian Xue
- Department of Chemistry and Biochemistry, University of Maryland, College Park, MD 20742, USA
| | - Peter Y Zavalij
- Department of Chemistry and Biochemistry, University of Maryland, College Park, MD 20742, USA
| | - Lyle Isaacs
- Department of Chemistry and Biochemistry, University of Maryland, College Park, MD 20742, USA
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12
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Bauer D, Andrae B, Gaß P, Trenz D, Becker S, Kubik S. Correction: Functionalisable acyclic cucurbiturils. Org Chem Front 2019. [DOI: 10.1039/c9qo90027f] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Correction for ‘Functionalisable acyclic cucurbiturils’ by Daniel Bauer et al., Org. Chem. Front., 2019, DOI: 10.1039/C9QO00156E.
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Affiliation(s)
- Daniel Bauer
- Technische Universität Kaiserslautern
- Fachbereich Chemie – Organische Chemie
- Erwin-Schrödinger-Straße
- 67663 Kaiserslautern
- Germany
| | - Beatrice Andrae
- Technische Universität Kaiserslautern
- Fachbereich Chemie – Organische Chemie
- Erwin-Schrödinger-Straße
- 67663 Kaiserslautern
- Germany
| | - Patrick Gaß
- Technische Universität Kaiserslautern
- Fachbereich Chemie – Organische Chemie
- Erwin-Schrödinger-Straße
- 67663 Kaiserslautern
- Germany
| | - Danjano Trenz
- Organic Chemistry II
- Saarland University
- 66123 Saarbrücken
- Germany
| | - Sabine Becker
- Technische Universität Kaiserslautern
- Fachbereich Chemie – Anorganische Chemie
- 67663 Kaiserslautern
- Germany
| | - Stefan Kubik
- Technische Universität Kaiserslautern
- Fachbereich Chemie – Organische Chemie
- Erwin-Schrödinger-Straße
- 67663 Kaiserslautern
- Germany
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13
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Rayavarapu S, Kheria S, Shinde DR, Gonnade RG, Sanjayan GJ. A modular approach towards functionalized highly stable self-complementary quadruple hydrogen bonded systems. Org Biomol Chem 2017; 15:10087-10094. [PMID: 29170774 DOI: 10.1039/c7ob02358h] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
Self-complementary quadruple hydrogen bonded systems have shown potential as key building blocks for developing various supramolecular polymers. Opportunities for the introduction of multiple functionalities would further augment, in principle, their application potential. Herein, we report a novel modular approach to simultaneously introduce two closely aligned side chains into AADD-type self-complementary quadruple hydrogen-bonding systems. Dithiane-tethered ureidopyrimidinone has been used as a reactive intermediate to efficiently attach closely aligned side chains by simply reacting with amines to form highly stable molecular duplexes. These duplexes featuring AADD-type arrays of hydrogen bonding codes are highly stable in non-polar solvents (Kdim > 1.9 × 107 M-1 in CDCl3) as well as in polar solvents (Kdim > 105 in 10% DMSO-d6/CDCl3). Another notable feature of these self-assembling systems is their insensitivity to prototropy-related issues owing to their prototropic degeneracy, which will enhance their application potential in supramolecular chemistry.
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Affiliation(s)
- Suresh Rayavarapu
- Organic Chemistry Division, CSIR-National Chemical Laboratory (CSIR-NCL), Dr Homi Bhabha Road, Pune-411008, India.
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14
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Kheria S, Rayavarapu S, Kotmale AS, Shinde DR, Gonnade RG, Sanjayan GJ. Coumarin-Appended Stable Fluorescent Self-Complementary Quadruple-Hydrogen-Bonded Molecular Duplexes. J Org Chem 2017; 82:6403-6408. [PMID: 28558211 DOI: 10.1021/acs.joc.7b01249] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
In this paper we report a coumarin-conjugated self-assembling system adorned with valuable features such as high duplex stability and a built-in fluorophore, which would augment its application potential. This system forms a highly stable molecular duplex in a nonpolar solvent (Kdim > 1.9 × 107 M-1 in CDCl3). Due to the fluorescent property of coumarin, these new structural motifs may find potential application in material chemistry and supramolecular chemistry.
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Affiliation(s)
- Sanjeev Kheria
- Organic Chemistry Division, ‡Central NMR Facility, and §Centre for Materials Characterization, Council of Scientific and Industrial Research National Chemical Laboratory (CSIR-NCL) , Dr. Homi Bhabha Road, Pune 411008, India
| | - Suresh Rayavarapu
- Organic Chemistry Division, ‡Central NMR Facility, and §Centre for Materials Characterization, Council of Scientific and Industrial Research National Chemical Laboratory (CSIR-NCL) , Dr. Homi Bhabha Road, Pune 411008, India
| | - Amol S Kotmale
- Organic Chemistry Division, ‡Central NMR Facility, and §Centre for Materials Characterization, Council of Scientific and Industrial Research National Chemical Laboratory (CSIR-NCL) , Dr. Homi Bhabha Road, Pune 411008, India
| | - Dinesh R Shinde
- Organic Chemistry Division, ‡Central NMR Facility, and §Centre for Materials Characterization, Council of Scientific and Industrial Research National Chemical Laboratory (CSIR-NCL) , Dr. Homi Bhabha Road, Pune 411008, India
| | - Rajesh G Gonnade
- Organic Chemistry Division, ‡Central NMR Facility, and §Centre for Materials Characterization, Council of Scientific and Industrial Research National Chemical Laboratory (CSIR-NCL) , Dr. Homi Bhabha Road, Pune 411008, India
| | - Gangadhar J Sanjayan
- Organic Chemistry Division, ‡Central NMR Facility, and §Centre for Materials Characterization, Council of Scientific and Industrial Research National Chemical Laboratory (CSIR-NCL) , Dr. Homi Bhabha Road, Pune 411008, India
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15
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Kheria S, Rayavarapu S, Kotmale AS, Gonnade RG, Sanjayan GJ. Triazine-Based Highly Stable AADD-Type Self-Complementary Quadruple Hydrogen-Bonded Systems Devoid of Prototropy. Chemistry 2016; 23:783-787. [DOI: 10.1002/chem.201605208] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2016] [Indexed: 11/10/2022]
Affiliation(s)
- Sanjeev Kheria
- Organic Chemistry Division; CSIR-National Chemical Laboratory; Dr. Homi Bhabha Road Pune 411008 India
| | - Suresh Rayavarapu
- Organic Chemistry Division; CSIR-National Chemical Laboratory; Dr. Homi Bhabha Road Pune 411008 India
| | - Amol S. Kotmale
- Central NMR Facility; CSIR-National Chemical Laboratory; Dr. Homi Bhabha Road Pune 411008 India
| | - Rajesh G. Gonnade
- Centre for Materials Characterization; CSIR-National Chemical Laboratory; Dr. Homi Bhabha Road Pune- 411008 India
| | - Gangadhar J. Sanjayan
- Organic Chemistry Division; CSIR-National Chemical Laboratory; Dr. Homi Bhabha Road Pune 411008 India
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16
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Perhydroxycucurbit[6]uril-induced self-assembly of a double-hydrophilic block copolymer in aqueous solution. J INCL PHENOM MACRO 2016. [DOI: 10.1007/s10847-016-0676-2] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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17
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Abstract
It is shown that the conformational energy ΔGC required for the formation of a suitable cavity or cleft for ligand binding in absence of an effector E is the essential factor for the efficiency of synthetic allosteric systems with positive cooperativity.
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