1
|
Li F, Zheng ZJ, Shang JY, Jiang KZ, Lai GQ, Jiang JX, Xu LW. A Chiral Cu-Salan Catalyst with a Rotatable Aromatic π-Wall: Molecular Recognition-Oriented Asymmetric Henry Transformation of Aromatic Aldehydes. Chem Asian J 2012; 7:2008-13. [DOI: 10.1002/asia.201200388] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2012] [Revised: 05/17/2012] [Indexed: 11/07/2022]
|
2
|
Jiang W, Schäfer A, Mohr PC, Schalley CA. Monitoring Self-Sorting by Electrospray Ionization Mass Spectrometry: Formation Intermediates and Error-Correction during the Self-Assembly of Multiply Threaded Pseudorotaxanes. J Am Chem Soc 2010; 132:2309-20. [DOI: 10.1021/ja9101369] [Citation(s) in RCA: 188] [Impact Index Per Article: 13.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Wei Jiang
- Institut für Chemie und Biochemie, Freie Universität Berlin, Takustrasse 3, 14195 Berlin, Germany
| | - Andreas Schäfer
- Institut für Chemie und Biochemie, Freie Universität Berlin, Takustrasse 3, 14195 Berlin, Germany
| | - Parveen Choudhary Mohr
- Institut für Chemie und Biochemie, Freie Universität Berlin, Takustrasse 3, 14195 Berlin, Germany
| | - Christoph A. Schalley
- Institut für Chemie und Biochemie, Freie Universität Berlin, Takustrasse 3, 14195 Berlin, Germany
| |
Collapse
|
3
|
Hoeben FJ, Zhang J, Lee CC, Pouderoijen MJ, Wolffs M, Würthner F, Schenning AP, Meijer E, De Feyter S. Visualization of Various Supramolecular Assemblies of Oligo(para-phenylenevinylene)-Melamine and Perylene Bisimide. Chemistry 2008; 14:8579-89. [DOI: 10.1002/chem.200800760] [Citation(s) in RCA: 46] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
|
4
|
Kerckhoffs JMCA, Mateos-Timoneda MA, Reinhoudt DN, Crego-Calama M. Dynamic Combinatorial Libraries Based on Hydrogen-Bonded Molecular Boxes. Chemistry 2007; 13:2377-85. [PMID: 17139688 DOI: 10.1002/chem.200601198] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
This article describes two different types of dynamic combinatorial libraries of host and guest molecules. The first part of this article describes the encapsulation of alizarin trimer 2a3 by dynamic mixtures of up to twenty different self-assembled molecular receptors together with the amplification and selection of the best binder. Receptors (1a-d)3.(DEB)6 are formed by the self-assembly of six diethyl barbiturate (DEB) and calix[4]arene dimelamine derivatives 1a-d by using hydrogen bonds. The largest amplification factor (2.8) for a host assembly (1a3.(DEB)6) was observed after the addition of 2a to four-component library 1a(n).1b(3-n).(DEB)6 (n=0-3). Addition of 2a to twenty-component library 1a(n).1b(m).1c(o).1d(3-(n+m+o)).(DEB)6 (n, m, o=0-3; (n+m+o)<or=3) also showed amplification of receptor 1a3.(DEB)6. The second part of this article describes the complexation of libraries of different alizarin-like guest molecules (2a-d) and the self-assembled receptor 1a3.(DEB)6. This receptor is able to template the formation of the best-fitting guest trimer.
Collapse
Affiliation(s)
- Jessica M C A Kerckhoffs
- Laboratory of Supramolecular Chemistry and Technology, MESA+ Institute for Nanotechnology, University of Twente, P.O. Box 217, 7500 AE Enschede, The Netherlands
| | | | | | | |
Collapse
|
5
|
Cohen Y, Avram L, Frish L. Diffusion NMR spectroscopy in supramolecular and combinatorial chemistry: an old parameter--new insights. Angew Chem Int Ed Engl 2006; 44:520-54. [PMID: 15625667 DOI: 10.1002/anie.200300637] [Citation(s) in RCA: 916] [Impact Index Per Article: 50.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
Intermolecular interactions in solution play an important role in molecular recognition, which lies at the heart of supramolecular and combinatorial chemistry. Diffusion NMR spectroscopy gives information over such interactions and has become the method of choice for simultaneously measuring diffusion coefficients of multicomponent systems. The diffusion coefficient reflects the effective size and shape of a molecular species. Applications of this technique include the estimation of association constants and mapping the intermolecular interactions in multicomponent systems as well as investigating aggregation, ion pairing, encapsulation, and the size and structure of labile systems. Diffusion NMR spectroscopy can also be used to virtually separate mixtures and screen for specific ligands of different receptors, and may assist in finding lead compounds.
Collapse
Affiliation(s)
- Yoram Cohen
- School of Chemistry, Tel Aviv University, Ramat Aviv, Tel Aviv 69978, Israel.
| | | | | |
Collapse
|
6
|
Mateos-Timoneda MA, Kerckhoffs JMCA, Crego-Calama M, Reinhoudt DN. Ditopic Complexation and Release of Neutral Guest Molecules by a Hydrogen-Bonded “Endo-Exo” Receptor. Angew Chem Int Ed Engl 2005. [DOI: 10.1002/ange.200500134] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
|
7
|
Mateos-Timoneda MA, Kerckhoffs JMCA, Crego-Calama M, Reinhoudt DN. Ditopic Complexation and Release of Neutral Guest Molecules by a Hydrogen-Bonded “Endo-Exo” Receptor. Angew Chem Int Ed Engl 2005; 44:3248-53. [PMID: 15844120 DOI: 10.1002/anie.200500134] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Miguel A Mateos-Timoneda
- Laboratory of Supramolecular Chemistry and Technology, MESA+ Institute for Nanotechnology and Faculty of Science and Technology, University of Twente, P.O. Box 217, 7500 AE Enschede, The Netherlands
| | | | | | | |
Collapse
|
8
|
Hiraoka S, Harano K, Shiro M, Shionoya M. Quantitative Dynamic Interconversion between AgI-Mediated Capsule and Cage Complexes Accompanying Guest Encapsulation/Release. Angew Chem Int Ed Engl 2005. [DOI: 10.1002/ange.200462394] [Citation(s) in RCA: 44] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
|
9
|
Hiraoka S, Harano K, Shiro M, Shionoya M. Quantitative Dynamic Interconversion between Ag
I
‐Mediated Capsule and Cage Complexes Accompanying Guest Encapsulation/Release. Angew Chem Int Ed Engl 2005; 44:2727-2731. [PMID: 15798985 DOI: 10.1002/anie.200462394] [Citation(s) in RCA: 114] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Shuichi Hiraoka
- Department of Chemistry, Graduate School of Science, The University of Tokyo, Hongo, Bunkyo-ku, Tokyo 113-0033, Japan, Fax: (+81) 3-5841-8061
| | - Koji Harano
- Department of Chemistry, Graduate School of Science, The University of Tokyo, Hongo, Bunkyo-ku, Tokyo 113-0033, Japan, Fax: (+81) 3-5841-8061
| | - Motoo Shiro
- Rigaku Corporation, 3-9-12 Matsubaracho, Akishima, Tokyo 196-8666, Japan
| | - Mitsuhiko Shionoya
- Department of Chemistry, Graduate School of Science, The University of Tokyo, Hongo, Bunkyo-ku, Tokyo 113-0033, Japan, Fax: (+81) 3-5841-8061
| |
Collapse
|
10
|
Cohen Y, Avram L, Frish L. Diffusions-NMR-Spektroskopie in der Supramolekularen und Kombinatorischen Chemie: ein alter Parameter - neue Erkenntnisse. Angew Chem Int Ed Engl 2005. [DOI: 10.1002/ange.200300637] [Citation(s) in RCA: 235] [Impact Index Per Article: 12.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
|
11
|
Kerckhoffs JM, Ishi-i T, Paraschiv V, Timmerman P, Crego-Calama M, Shinkai S, Reinhoudt DN. Complexation of phenolic guests by endo- and exo-hydrogen-bonded receptors. Org Biomol Chem 2003; 1:2596-603. [PMID: 12956083 DOI: 10.1039/b302836d] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
This article describes the complexation of phenol derivatives by hydrogen-bonded receptors. These phenol receptors are formed by self-assembly of calix[4]arene dimelamine or tetramelamine derivatives with 5,5-diethylbarbiturate (DEB) or cyanurate derivatives (CYA). The double rosette assemblies 3(3).(DEB)6/(CYA)6 have their phenol-binding functionalities (ureido groups) at the top and at the bottom of the double rosette (exo-receptors). The tetrarosette assemblies 4(3).(DEB)12/(CYA)12 form a cavity with binding sites between the two double rosettes for guest encapsulation (endo-receptors). An intrinsic binding constant Ka of 202 M-1 and 286 M-1 for the binding of 4-nitrophenol to the ureido functionalized exo- and endo-receptors, respectively, was observed. For the exo-receptor a 1:6 stoichiometry was observed while for the endo-receptor 1:4 binding stoichiometry was determined by Job plot and MALDI-TOF MS. The important role that the hydroxy group's acidity plays in the complexation of 4-nitrophenol is clarified by binding studies with different phenol derivatives. The hydrogen-bonded receptors showed a much smaller response towards less acidic phenol derivatives.
Collapse
Affiliation(s)
- Jessica M Kerckhoffs
- Laboratory of Supramolecular Chemistry and Technology, MESA Research Institute, University of Twente, P. O. Box 217, 7500 AE Enschede, The Netherlands
| | | | | | | | | | | | | |
Collapse
|
12
|
Prins LJ, Neuteboom EE, Paraschiv V, Crego-Calama M, Timmerman P, Reinhoudt DN. Kinetic stabilities of double, tetra-, and hexarosette hydrogen-bonded assemblies. J Org Chem 2002; 67:4808-20. [PMID: 12098292 DOI: 10.1021/jo0201023] [Citation(s) in RCA: 41] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
A study of the kinetic stabilities of hydrogen-bonded double, tetra-, and hexarosette assemblies, comprising 36, 72, and 108 hydrogen bonds, respectively, is described. The kinetic stabilities are measured using both chiral amplification and racemization experiments. The chiral amplification studies show that solvent polarity and temperature strongly affect the kinetic stabilities of these hydrogen-bonded assemblies. For example, the activation energy for the dissociation of a tetramelamine from a tetrarosette assembly, a process that involves the breakage of 24 hydrogen bonds, was determined at 98.7 +/- 16.6 kJ mol(-1) in chloroform and 172.8 +/- 11.3 kJ mol(-1) in benzene. Moreover, racemization studies with enantiomerically enriched assemblies reveal a strong dependence of the kinetic stability on the number and strength of the hydrogen bonds involved in assembly formation. The half-lives for double, tetra-, and hexarosette assemblies were found to be 8.4 min, 5.5 h, and 150 h in chloroform at 50 degrees C, respectively. For higher generations of these types of assemblies, the kinetic stabilities become so high that they can no longer measured in a direct manner.
Collapse
Affiliation(s)
- Leonard J Prins
- Laboratory of Supramolecular Chemistry and Technology, MESA Research Institute, University of Twente, P.O. Box 217, 7500 AE Enschede, The Netherlands
| | | | | | | | | | | |
Collapse
|
13
|
Prins LJ, Timmerman P, Reinhoudt DN. Amplification of chirality: the "sergeants and soldiers" principle applied to dynamic hydrogen-bonded assemblies. J Am Chem Soc 2001; 123:10153-63. [PMID: 11603964 DOI: 10.1021/ja010610e] [Citation(s) in RCA: 138] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The amplification of supramolecular chirality has been studied in dynamic chiral hydrogen-bonded assemblies 1(3).(CA)(6) using "Sergeants and Soldiers" experiments. Previously, we have shown that chiral centers present in either the dimelamine component 1 or the cyanurate component CA quantitatively induce one handedness (M or P) in the assembly. This offers the possibility to study the amplification of chirality under two different kinetic regimes. When chiral dimelamines 1 are used, the exchange of chiral components and (M/P)-interconversion, i.e., interconversion between the (M)- and (P)-isomers of assembly 1(3).(CA)(6), take place via identical pathways (condition A). When chiral cyanurates CA are used, the exchange of chiral components occurs much faster than (M/P)-interconversion (condition B). Experimentally, a much stronger chiral amplification is observed under condition B. For example, the observed chiral amplification for a mixture of chiral and achiral components (40:60) is 46% under condition B and 32% under condition A. Kinetic models were developed to fit the experimental data and to simulate chiral amplification in dynamic systems in general. These simulations show that it is theoretically possible that the diastereomeric excess in a dynamic system is more than 99% with less than 1% chiral component present!
Collapse
Affiliation(s)
- L J Prins
- Contribution from the Laboratory of Supramolecular Chemistry and Technology, MESA(+) Research Institute, University of Twente, P.O. Box 217, 7500 AE, Enschede, The Netherlands
| | | | | |
Collapse
|
14
|
Bielejewska AG, Marjo CE, Prins LJ, Timmerman P, de Jong F, Reinhoudt DN. Thermodynamic stabilities of linear and crinkled tapes and cyclic rosettes in melamine--cyanurate assemblies: a model description. J Am Chem Soc 2001; 123:7518-33. [PMID: 11480972 DOI: 10.1021/ja010664o] [Citation(s) in RCA: 116] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
In this paper we describe model calculations for the self-assembly of N,N-disubstituted melamines 1 and N-substituted cyanuric acid or 5,5-disubstituted barbituric acid derivatives 2 into linear or crinkled tapes and cyclic rosettes via cooperative hydrogen bond formation. The model description considers all possible stereoisomeric tape structures consisting of two to eight different components (270 different species in total) and one cyclic hexameric rosette structure. Furthermore, eight steric parameters (R(12)-R(28)) are included that represent the different types of steric interactions within the assemblies. Most importantly, the model calculations clearly show that the tape/rosette ratio is very sensitive to changes in parameters that directly affect the internal energy of the rosette structure. In this respect, three parameters have been characterized, i.e., the basic equilibrium constant K(0) for the bimolecular association of a melamine and cyanurate, the equilibrium constant K(r)/K(0) for the cyclization of a linear hexamer, and the parameter R(12)-a(Z)b, representing attractive or repulsive interactions between adjacent melamine and cyanurate moieties. For example, an increase in K(0) from 100 to 10,000 M(-1) ([A](0) = [B](0) = 10 mM, K(r) = 0.01 M) or in K(r) from 0.001 to 0.1 M ([A](0) = [B](0) = 10 mM, K(0) = 1000 M(-1)) raises the concentration of the rosette from <5 to approximately 90% or from approximately 10 to approximately 85%, respectively. Similarly, a change in R(12)-a(Z)b from 1.0 (no repulsive or attractive interactions) to 1.5 (slight attractive interaction) raises the rosette fraction of the mixture from 25% to 45%. In sharp contrast to this, the model calculations show that parameters that only affect the internal energy of the tapes (R(13)--R(28)) hardly change the tape/rosette ratio. For example, by changing R(13)-a(EE)a from 1.0 (no repulsive or attractive interactions) to 0.001 (maximum repulsion), the rosette fraction in the mixture changes by no more than 8%. Including all possible sterics that occur only in tapes (i.e., R(13)--R(28)), the maximum change in rosette fraction is no more than 16%. These predictions can be rationalized by considering that any change in the stability of the tapes only affects the rosette concentration by means of shifting the equilibrium between free 1 and 2 and the rosette. Since there are 270 different tapelike structures in equilibrium, this mixture represents the best buffer solution in the world. These model calculations seem to conflict with the concept of peripheral crowding as put forward by Whitesides et al., which states that bulky substituents on the periphery of the melamine (and cyanurate) components can be used to shift the tape/rosette equilibrium completely toward the rosette structure. Computer simulations (CHARMm 24.0) show that linear tapes with bulky substituents are severely distorted from planarity, while the corresponding rosette remains planar. Therefore, tapelike structures with bulky substituents are expected to have a much higher solubility than the corresponding rosettes, which can explain the observed crystal data.
Collapse
Affiliation(s)
- A G Bielejewska
- Laboratory of Supramolecular Chemistry and Technology, MESA(+) Research Institute, University of Twente, P.O. Box 217, 7500 AE Enschede, The Netherlands
| | | | | | | | | | | |
Collapse
|
15
|
|
16
|
|
17
|
Abstract
Hydrogen bonds are like human beings in the sense that they exhibit typical grouplike behavior. As an individual they are feeble, easy to break, and sometimes hard to detect. However, when acting together they become much stronger and lean on each other. This phenomenon, which in scientific terms is called cooperativity, is based on the fact that "1+1 is more than 2". By using this principle, chemists have developed a wide variety of chemically stable structures that are based on the reversible formation of multiple hydrogen bonds. More than 20 years of fundamental studies on these phenomena have gradually developed into a new discipline within the field of organic synthesis, and is nowadays called "noncovalent synthesis". This review describes noncovalent synthesis based on the reversible formation of multiple hydrogen bonds. Starting with a thorough description of what the "hydrogen bond" really is, it guides the reader through a variety of bimolecular and higher order assemblies and exemplifies the general principles that determine their stability. Special focus is given to reversible capsules based on hydrogen-bonding interactions that exhibit interesting encapsulation phenomena. Furthermore, the role of hydrogen-bond formation in self-replicating processes is actively discussed, and finally the review briefly summarizes the development of novel materials (nanotubes, liquid crystals, polymers, etc.) and principles (dynamic libraries) that recently have emanated from this intriguing field of research.
Collapse
Affiliation(s)
- Leonard J. Prins
- Laboratory of Supramolecular Chemistry and Technology MESA(+) Research Institute University of Twente P.O. Box 217, 7500 AE Enschede (The Netherlands)
| | | | | |
Collapse
|
18
|
Abstract
A new type of calixarene has been synthesised. Like resorcinol and a number of resorcinol derivatives, 2,6-dihydroxypyridine has been proven to form cyclic tetramers in moderate yields with a number of aliphatic and two aromatic aldehydes in acidic media. The problem of the formation of configurational isomers can be reduced by increasing the reaction temperature and time. With electron-rich aromatic aldehydes, 2,6-dihydroxypyridine unexpectedly yields deep-coloured acyclic quinoid systems. The octahydroxypyridine[4]arenes may have a high potential as receptors for molecular recognition and self organisation.
Collapse
Affiliation(s)
- T Gerkensmeier
- Institut für Organische Chemie, Christian-Albrechts-Universität zu Kiel, Germany
| | | | | |
Collapse
|
19
|
Timmerman P, Jolliffe KA, Calama MC, Weidmann JL, Prins LJ, Cardullo F, Snellink-Ruël BH, Fokkens RH, Nibbering NM, Shinkai S, Reinhoudt DN. Ag+ labeling: a convenient new tool for the characterization of hydrogen-bonded supramolecular assemblies by MALDI-TOF mass spectrometry. Chemistry 2000; 6:4104-15. [PMID: 11128274 DOI: 10.1002/1521-3765(20001117)6:22<4104::aid-chem4104>3.0.co;2-q] [Citation(s) in RCA: 39] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
Herein we describe our results on the characterization of a wide variety of different hydrogen-bonded assemblies by means of a novel matrix-assisted laser desorption ionization time-of-flight mass spectrometry (MALDI-TOF MS) technique with Ag+ labeling. The labeling technique with Ag+ ions is extremely mild and provides a nondestructive way to generate charged assemblies that can be detected by mass spectrometry. Up to now more than 25 different single (1(3).2(3)), double (3(3).2(6)), and tetrarosettes (4(3).2(12)) have been successfully characterized by the use of this method. The success of the method entirely depends on the presence of a suitable binding site for the Ag+ ion. A variety of functionalities has been identified that provide strong binding sites for Ag+, either acting in a cooperative way (pi-arene and pi-alkene donor functionalities) or individually (cyano and crown ether functionalities). The method works well for assemblies with molecular weights between 2,000 and 8,000 Da, and most likely far beyond this limit.
Collapse
Affiliation(s)
- P Timmerman
- Laboratory of Supramolecular Chemistry and Technology, MESA+ Research Institute, Univeristy of Twente, Enschede, The Netherlands
| | | | | | | | | | | | | | | | | | | | | |
Collapse
|
20
|
Higler I, Grave L, Breuning E, Verboom W, Jong F, Fyles T, Reinhoudt D. Stable Heterotopic Noncovalent Resorcin[4]arene Assemblies. European J Org Chem 2000. [DOI: 10.1002/(sici)1099-0690(200005)2000:9<1727::aid-ejoc1727>3.0.co;2-0] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
|
21
|
Calama MC, Timmerman P, Reinhoudt DN. Guest-Templated Selection and Amplification of a Receptor by Noncovalent Combinatorial Synthesis. Angew Chem Int Ed Engl 2000. [DOI: 10.1002/(sici)1521-3757(20000218)112:4<771::aid-ange771>3.0.co;2-7] [Citation(s) in RCA: 22] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
|
22
|
Gerkensmeier T, Iwanek W, Agena C, Fröhlich R, Kotila S, Näther C, Mattay J. Self-Assembly of 2,8,14,20-Tetraisobutyl-5,11,17,23-tetrahydroxyresorc[4]arene. European J Org Chem 1999. [DOI: 10.1002/(sici)1099-0690(199909)1999:9<2257::aid-ejoc2257>3.0.co;2-h] [Citation(s) in RCA: 250] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
|
23
|
Jolliffe KA, Timmerman P, Reinhoudt DN. Aufbau durch Wasserstoffbrücken zusammengehaltener Nanostrukturen aus 15 Komponenten. Angew Chem Int Ed Engl 1999. [DOI: 10.1002/(sici)1521-3757(19990401)111:7<983::aid-ange983>3.0.co;2-p] [Citation(s) in RCA: 33] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
|
24
|
|
25
|
|
26
|
Jolliffe K, Crego Calama M, Fokkens R, Nibbering N, Timmerman P, Reinhoudt D. Charakterisierung von supramolekularen Wasserstoffbrücken-Aggregaten durch MALDI-TOF-Massenspektrometrie nach Markierung mit Ag+. Angew Chem Int Ed Engl 1998. [DOI: 10.1002/(sici)1521-3757(19980504)110:9<1294::aid-ange1294>3.0.co;2-z] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
|
27
|
Mattei S, Wallimann P, Kenda B, Amrein W, Diederich F. Dendrophanes: Water-soluble dendritic receptors as models for buried recognition sites in globular proteins. Helv Chim Acta 1997. [DOI: 10.1002/hlca.19970800810] [Citation(s) in RCA: 39] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
|
28
|
Timmerman P, Vreekamp RH, Hulst R, Verboom W, Reinhoudt DN, Rissanen K, Udachin KA, Ripmeester J. Noncovalent Assembly of Functional Groups on Calix[4]Arene Molecular Boxes. Chemistry 1997. [DOI: 10.1002/chem.19970031115] [Citation(s) in RCA: 114] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
|
29
|
Huck WTS, Hulst R, Timmerman P, Van Veggel FCJM, Reinhoudt DN. Nichtkovalenter Aufbau von Nanostrukturen durch Nutzen aus koordinationschemischer Methoden und von Wasserstoffbrückenbindungen. Angew Chem Int Ed Engl 1997. [DOI: 10.1002/ange.19971090930] [Citation(s) in RCA: 33] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
|
30
|
Ashton PR, Collins AN, Fyfe MCT, Glink PT, Menzer S, Stoddart JF, Williams DJ. Synthese eines nichtkovalent verflochtenen supramolekularen Käfigs. Angew Chem Int Ed Engl 1997. [DOI: 10.1002/ange.19971090112] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
|