Skip to main content
U.S. Department of Energy
Office of Scientific and Technical Information

Different and Often Opposing Forces Drive the Encapsulation and Multiple Exterior Binding of Charged Guests to a M 4 L 6 Supramolecular Vessel in Water

Journal Article · · Chemistry - A European Journal
 [1];  [1];  [1];  [2];  [3];  [1]
  1. Department of Chemistry University of California, Berkeley and Chemical Science Division, Lawrence Berkeley National Laboratory Berkeley California 94720-1460 USA
  2. Istituto di Biostrutture e Bioimmagini CNR, UOS Catania Via P. Gaifami 18 95125 Catania Italy
  3. Dipartimento di Scienze Chimiche Università degli Studi di Catania Viale A. Doria 6 95125 Catania Italy

Abstract

The supramolecular assembly [Ga 4 L 6 ] 12− acts as a nanoscale flask to mediate the reactivity of encapsulated reactive guests and also functions as a catalyst to carry out enzyme‐like chemical transformations. The guest binding to the interior cavity and exterior of this host is difficult to untangle because multiple equilibria occur in solution, and only when refining simultaneously data obtained from different techniques, such as NMR, UV/Vis, and calorimetry, can the accurate solution thermodynamics of these host–guest systems be determined. This study reports the driving forces for the inclusion and stepwise exterior guest binding of different aliphatic quaternary ammonium guests to the [Ga 4 L 6 ] 12− assembly. Encapsulation into the host cavity was found to be an entropy‐driven process, whereas exterior ion association is driven either by enthalpically favorable attractive forces or by the entropy gain due to desolvation, depending on guest size and character. The analysis of the energetics of reaction may help predicting and understanding the intimate role and contribution of the transition state in those rate‐accelerated reactions involving this supramolecular assembly as an enzyme‐like molecular flask.

Sponsoring Organization:
USDOE
Grant/Contract Number:
AC02-05CH11231
OSTI ID:
1408154
Journal Information:
Chemistry - A European Journal, Journal Name: Chemistry - A European Journal Journal Issue: 66 Vol. 23; ISSN 0947-6539
Publisher:
Wiley Blackwell (John Wiley & Sons)Copyright Statement
Country of Publication:
Germany
Language:
English

References (56)

Selbstorganisation eines supramolekularen tetraedrischen M4L6-Clusters journal July 1998
The Self-Assembly of a Predesigned Tetrahedral M4L6 Supramolecular Cluster journal August 1998
Wechselwirkungen mit aromatischen Ringen in chemischen und biologischen Erkennungsprozessen journal March 2003
Funktionale molekulare Reaktionskolben: neuartige Eigenschaften und Reaktionen in diskreten, selbstorganisierten Wirtmolekülen journal April 2009
Enzymnachbildungen auf der Basis supramolekularer Koordinationschemie journal October 2010
Selektive Wirt-Gast-Bindung von Anionen ohne Hilfe von Wasserstoffbrücken: die Entropie als Designwerkzeug journal November 2011
Neues zum hydrophoben Effekt - Studien mit supramolekularen Komplexen zeigen hochenergetisches Wasser als nichtkovalente Bindungstriebkraft journal July 2014
Interactions with Aromatic Rings in Chemical and Biological Recognition journal March 2003
Functional Molecular Flasks: New Properties and Reactions within Discrete, Self-Assembled Hosts journal April 2009
Enzyme Mimics Based Upon Supramolecular Coordination Chemistry journal October 2010
Selective Host-Guest Binding of Anions without Auxiliary Hydrogen Bonds: Entropy as an Aid to Design journal November 2011
The Hydrophobic Effect Revisited-Studies with Supramolecular Complexes Imply High-Energy Water as a Noncovalent Driving Force journal July 2014
Origins of Large Rate Enhancements in the Nazarov Cyclization Catalyzed by Supramolecular Encapsulation journal February 2014
Complexation of biologically active amines by a water-soluble calix[5]arene: A nanocalorimetric investigation journal March 2015
Molecular recognition of organic anions by a water-soluble calix[4]arene: Evidence for enthalpy–entropy compensation journal February 2012
Global Multi-Method Analysis of Affinities and Cooperativity in Complex Systems of Macromolecular Interactions journal September 2012
Quantifying High-Affinity Binding of Hydrophobic Ligands by Isothermal Titration Calorimetry journal November 2012
Untangling the Diverse Interior and Multiple Exterior Guest Interactions of a Supramolecular Host by the Simultaneous Analysis of Complementary Observables journal June 2016
Experimental Binding Energies in Supramolecular Complexes journal May 2016
Cationic Noncovalent Interactions: Energetics and Periodic Trends journal March 2016
More Chemistry in Small Spaces journal May 2012
Stereochemistry in Subcomponent Self-Assembly journal April 2014
Proton-Mediated Chemistry and Catalysis in a Self-Assembled Supramolecular Host journal October 2009
Supramolecular Catalysis in Metal–Ligand Cluster Hosts journal April 2015
Complexation Thermodynamics of Cyclodextrins journal July 1998
Diffusion of a Highly Charged Supramolecular Assembly: Direct Observation of Ion Association in Water 1 journal March 2008
Structural Consequences of Anionic Host−Cationic Guest Interactions in a Supramolecular Assembly journal January 2009
Enthalpically driven cyclophane-arene inclusion complexation: solvent-dependent calorimetric studies journal July 1991
Molecular Recognition and Stabilization of Iminium Ions in Water journal November 2006
Making Amines Strong Bases:  Thermodynamic Stabilization of Protonated Guests in a Highly-Charged Supramolecular Host 1 journal September 2007
Extraction of Hydrophobic Species into a Water-Soluble Synthetic Receptor journal November 2007
The Hydrophobic Effect Drives the Recognition of Hydrocarbons by an Anionic Metal−Ligand Cluster 1 journal October 2007
Enthalpy−Entropy Compensation Reveals Solvent Reorganization as a Driving Force for Supramolecular Encapsulation in Water journal March 2008
Enzymelike Catalysis of the Nazarov Cyclization by Supramolecular Encapsulation journal May 2010
Alkane Lengths Determine Encapsulation Rates and Equilibria journal April 2012
Release of High-Energy Water as an Essential Driving Force for the High-Affinity Binding of Cucurbit[ n ]urils journal September 2012
Temporary and Permanent Trapping of the Metastable Twisted Conformer of an Overcrowded Chromic Alkene via Encapsulation journal October 2012
Selective Monoterpene-like Cyclization Reactions Achieved by Water Exclusion from Reactive Intermediates in a Supramolecular Catalyst journal October 2012
Solvent and Pressure Effects on the Motions of Encapsulated Guests: Tuning the Flexibility of a Supramolecular Host journal March 2013
Cucurbit[8]uril and Blue-Box: High-Energy Water Release Overwhelms Electrostatic Interactions journal September 2013
Rationally Designed Cooperatively Enhanced Receptors To Magnify Host–Guest Binding in Water journal January 2015
Aza Cope Rearrangement of Propargyl Enammonium Cations Catalyzed By a Self-Assembled “Nanozyme” journal August 2008
External and Internal Guest Binding of a Highly Charged Supramolecular Host in Water: Deconvoluting the Very Different Thermodynamics journal January 2010
Selective Encapsulation of Aqueous Cationic Guests into a Supramolecular Tetrahedral [M 4 L 6 ] 12 - Anionic Host 1 journal August 1998
Concerning the thermodynamics of molecular recognition in aqueous and organic media. Evidence for significant heat capacity effects journal April 1990
A supramolecular approach to combining enzymatic and transition metal catalysis journal January 2013
Integration and global analysis of isothermal titration calorimetry data for studying macromolecular interactions journal April 2016
Water-soluble, self-assembling container molecules: an update journal January 2011
Molecular containers assembled through the hydrophobic effect journal January 2015
Factors driving the self-assembly of water-soluble calix[4]arene and gemini guests: a combined solution, computational and solid-state study journal January 2014
Stereochemistry and thermodynamics of the inclusion of aliphatic and aromatic anionic guests in a tetracationic calix[4]arene in acidic and neutral aqueous solutions journal January 2009
Protein-like proton exchange in a synthetic host cavity journal November 2015
Acid Catalysis in Basic Solution: A Supramolecular Host Promotes Orthoformate Hydrolysis journal April 2007
Allosteric Supramolecular Triple-Layer Catalysts journal September 2010
A supramolecular microenvironment strategy for transition metal catalysis journal December 2015
A synthetic and NMR conformational study of spiro cyclic quaternary ammonium salts journal January 2002

Similar Records

External and Internal Guest Binding of a Highly Charged Supramolecular Host in Water: Deconvoluting the Very Different Thermodynamics
Journal Article · Wed Jul 22 00:00:00 EDT 2009 · Journal of the American Chemical Society · OSTI ID:1001081

Structural Consequences of Anionic Host-Cationic Guest Interactions in a Supramolecular Assembly
Journal Article · Wed Jul 09 00:00:00 EDT 2008 · Inorganic Chemistry · OSTI ID:970330

Selective molecular recognition, C-H bond activation, and catalysis in nanoscale reaction vessels
Journal Article · Fri Nov 26 23:00:00 EST 2004 · Accounts of Chemical Research · OSTI ID:840989

Related Subjects