Self-assembly of amphiphilic calix[6]crowns: from vesicles to nanotubes

Guan, Bing; Jiang, Ming; Yang, Xiaogang; Qi, Liang; Chen, Yuanyin

doi:10.1039/b805312j

Cited by 28 publications

(13 citation statements)

References 28 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…We already proved that [7] TAC self-assembled into uniform vesicles or nanotubes in water/ethanol depending on the medium polarity. Briefly, TAC gave vesicles in water/ethanol (v:v = 1:3), and nanotubes in water/ethanol 1:1.…”

Section: Influence Of Haucl 4 On Morphology Of Npamentioning

confidence: 96%

See 1 more Smart Citation

Synchronous One-Pot (SOP) synthesis of hybrid structures: Metal nanoparticles in self-assemblies of amphiphilic calix[6]biscrowns

Chen

et al. 2012

Journal of Colloid and Interface Science

Self Cite

View full text Add to dashboard Cite

Section: Influence Of Haucl 4 On Morphology Of Npamentioning

confidence: 96%

“…Our group has studied continuously on self-assembly of amphiphilic calixarenes bearing two crown ether loops, named calix [6]biscrowns, which gave out uniform assembled structures in media with certain polarity [7]. The self-assembly process is fast, versatile, and controllable.…”

Section: Introductionmentioning

confidence: 99%

Synchronous One-Pot (SOP) synthesis of hybrid structures: Metal nanoparticles in self-assemblies of amphiphilic calix[6]biscrowns

Chen

et al. 2012

Journal of Colloid and Interface Science

Self Cite

View full text Add to dashboard Cite

“…When amphiphilic molecules prone to aggregation are involved in the process, one should keep to a cer tain concentration range in which the degree of aggre gation can be considered to be constant [1][2][3][4][5][6][7]. For example, in the case of water soluble calixarenes, which are distinguished by receptor properties [8][9][10][11][12][13][14], the presence of alkyl substituents in the lower rim pro vide macrocycles with amphiphilic character.…”

Section: Introductionmentioning

confidence: 99%

Aggregation and complexation in a series of tetramethylenesulfonate-substituted calix[4]resorcinarenes

et al. 2012

View full text Add to dashboard Cite

NMR methods are employed to study the effects of inorganic salts, solvents, and guest molecules of methylviologen (MV 2+ ) and choline (Ch + ) on the aggregation properties of water soluble tetramethylene sulfonate substituted calix[4]resorcinarenes containing methyl (1), amyl (2), and heptyl (3) substituents in the lower rim. It is established that, in aqueous solutions at concentrations of 1-10 mM, compound 1 exists in the monomeric form; the size of aggregates of amphiphilic compound 2 gradually increases (aggregation number varies from 1 to 20); and hydrophobic compound 3 dissolves only in slightly alkaline aqueous solu tions to form large micellar aggregates. For macrocycles 2 and 3, which are inclined to aggregation, the aggre gate sizes depend on the concentration, pH, and ionic strength of solutions, as well as on the presence of organic solvents. Macrocycle 1 binds guest molecules Ch + and MV 2+ to yield inclusion complexes. In the presence of aggregates of substance 2, the binding of guest molecules is more efficient and they are encapsu lated between the rim of one molecule and the tail of another molecule of compound 2. The presence of guest molecules enhances the aggregation of macrocycle 2. In the case of compound 3 solutions, guest Ch + mole cules are predominantly localized in the hydrophobic environment of alkyl substituents of the host.

show abstract

“…To reach this goal, rational design and modification of the self-assembling building blocks at the molecular level have been the most widely adopted approach. [16][17][18][19][20] In addition to structural modification, changing the environmental conditions such as pH, 21,22 temperature, 23,24 concentration, [25][26][27] and polarity of the medium 28,29 have also been explored to offer efficient control over the self-assembling process. This approach is attractive because different architectures may be assembled from the identical building blocks.…”

Section: Introductionmentioning

confidence: 99%

Controllable self-assemblies of micro/nano-tubes and vesicles from arylamides and their applications as templates to fabricate Pt micro/nano-tubes and hollow Pt nanospheres

Wang

Zhao

et al. 2010

Soft Matter

View full text Add to dashboard Cite

A novel class of nonamphiphilic aromatic amides (T1-T3) have been designed and synthesized from naphthalene-2,7-diamine or 2-amino-naphthalene and a 5-hydroxy-isophthalic acid segment, which is revealed to selectively assemble into vesicular or tubular architectures, depending on the solvents and concentrations. T1 and T2 form vesicles in methanol, but can be converted into micro/nano-tubes when water is added and further gelate the binary solvent when the concentration is high enough. In contrast, T3 self-assembles into fine tubular structures in methanol, but can be transformed into vesicles upon being diluted or adding chloroform. The morphology transition has been investigated by SEM, AFM, TEM and fluorescent microscopy, which also reveal that microtubes of large size are formed through the fusion of vesicles of small size, which is driven by the cooperative hydrogen bonding and aromatic stacking interactions, as evidenced by the X-ray investigation on an analogue of T3. The novel organic micro/nano-tubes and vesicles are further used to template the fabrication of Pt micro/nano-tubes or hollow Pt spheres by in situ reduction of the absorbed K 2 PtCl 4 with ascorbic acid, as confirmed by SEM, TEM and EDX analyses.

show abstract

Self-assembly of amphiphilic calix[6]crowns: from vesicles to nanotubes

Cited by 28 publications

References 28 publications

Synchronous One-Pot (SOP) synthesis of hybrid structures: Metal nanoparticles in self-assemblies of amphiphilic calix[6]biscrowns

Synchronous One-Pot (SOP) synthesis of hybrid structures: Metal nanoparticles in self-assemblies of amphiphilic calix[6]biscrowns

Aggregation and complexation in a series of tetramethylenesulfonate-substituted calix[4]resorcinarenes

Controllable self-assemblies of micro/nano-tubes and vesicles from arylamides and their applications as templates to fabricate Pt micro/nano-tubes and hollow Pt nanospheres

Contact Info

Product

Resources

About