Dendron-Mediated Self-Assembly, Disassembly, and Self-Organization of Complex Systems

Rosen, Brad M.; Wilson, Christopher J.; Wilson, Daniela A.; Peterca, Mihai; Imam, Mohammad R.; Percéc, Virgil

doi:10.1021/cr900157q

Cited by 1,148 publications

(885 citation statements)

References 1,304 publications

Supporting

Mentioning

864

Contrasting

Unclassified

Order By: Relevance

“…The dendrons can be attached to point-like cores, to linear polymer chains or to surfaces thus giving rise to three leading structural families of dendritic molecules: dendrimers [1][2][3][4][5] , dendronized polymers (DP) [6][7][8][9] and forests [10][11][12] . Their masses and spans depend on their generation g specifying the number of branching sites along a path between the attachment site and the terminus.…”

mentioning

confidence: 99%

“…Since the first reports of well-characterized dendrimers in 1985 (refs 16-19), thousands of research articles addressed their synthesis, properties and applications [1][2][3][4][5][6][7][8][9][20][21][22][23] . Recent activity in this area reflects a growing interest in biomedical applications such as bio-imaging, gene and drug delivery [24][25][26][27][28] . The overwhelming majority of the literature concerns the go og max range and highlights structural perfection.…”

mentioning

confidence: 99%

See 1 more Smart Citation

Synthetic regimes due to packing constraints in dendritic molecules confirmed by labelling experiments

Zhang

Schlüter

et al. 2013

Nat Commun

View full text Add to dashboard Cite

Classical theory predicts that branching defects are unavoidable in large dendritic molecules when steric congestion is important. Here we report first experimental evidence of this effect via labelling measurements of an extended homologous series of generations g ¼ 1y6 of dendronized polymers. This system exhibits a single type of defect interrogated specifically by the Sanger reagent thus permitting to identify the predicted upturn in the number of branching defects when g approaches g max and the polymer density approaches close packing. The average number of junctions and defects for each member of the series is recursively obtained from the measured molar concentrations of bound labels and the mass concentrations of the dendritic molecules. The number of defects increases at g ¼ 5 and becomes significant at g ¼ 6 for dendronized polymers where the g max was estimated to occur at 6.1 rg max r 7.1. The combination of labelling measurements with the novel theoretical analysis affords a method for characterizing high g dendritic systems.

show abstract

mentioning

confidence: 99%

mentioning

confidence: 99%

Synthetic regimes due to packing constraints in dendritic molecules confirmed by labelling experiments

Zhang

Schlüter

et al. 2013

Nat Commun

View full text Add to dashboard Cite

show abstract

“…43,44,[106][107][108] Dendrimers and dendrons are a class of macromolecules with repetitive branching units, which have attracted growing interest in polymer and materials science. 109,110 LC molecules with dendritic structures exhibit unique self-assembled behavior and functions.…”

Section: Dendritic Design For Lc Polymersmentioning

confidence: 99%

“…109,110 LC molecules with dendritic structures exhibit unique self-assembled behavior and functions. 43,44 Some representative dendritic LC molecules are shown in Figure 7. In the early stage of LC dendrimer, Percec et al 111 synthesized and characterized thermotropic nematic LC dendritic polymer 23.…”

Section: Dendritic Design For Lc Polymersmentioning

confidence: 99%

See 1 more Smart Citation

Functional liquid-crystalline polymers and supramolecular liquid crystals

Kato

Uchida

Ichikawa

et al. 2017

Polym J

View full text Add to dashboard Cite

The design and functions of liquid-crystalline (LC) polymers with classifying them into conventional-, supramolecular-, dendriticand network-type LC polymers are described. LC polymers show new functions as new devices in the field of energy and environment by incorporating mesogenic moieties exhibiting photonic, electronic and ionic functions. Supramolecular LC polymers show dynamic and unique properties because the mesogenic moieties are built with non-covalent interactions. Dendritic-type LC polymers exhibit liquid crystallinity by nanosegregation of aromatic and aliphatic moieties. Dendritic fork-like mesogens have also been prepared. A variety of nonmesogeic functional building blocks including fullerene, π-conjugated moieties, catenane, rotaxane and others can be incorporated into LC phases by attaching these dendritic moieties. LC networks are constructed in situ polymerization of polymerizable nematic or nanostructured liquid crystals. The specific characteristics of the LC networks have generated new research trends to develop well-defined polymers that exhibit optical, transport and separation properties. In these materials, through suitable design of LC monomers, the preservation of smectic, columnar and bicontinuous cubic phases has been successfully used for the development of membranes with one-dimensional, two-dimensional and three-dimensional nanostructures.

show abstract

Liquid Crystals

Bisoyi

2014

Kirk-Othmer Encyclopedia of Chemical Technology

View full text Add to dashboard Cite

Liquid crystals (LCs) represent a state of matter which is characterized by a unique combination of order and mobility on molecular, supramolecular and macroscopic levels. This is a true thermodynamic stable state of matter and has been recognized and accepted as the fourth state of matter after solid, liquid, and gas (1-18). They have developed from a mere scientific curiosity in the beginning to one of the foundations of mobile information technology devices today (19)(20)(21)(22)(23)(24)(25). LCs are presently common topics in academic books and also in our daily life. Terms such as LCD, ie, LC display, and Kevlar have become familiar consumer products. The unusual feature which makes this state of matter unique among the others is the combination of orientational (and, sometimes, positional) order and dynamics, giving rise to materials with anisotropic physical properties that are switchable under the influence of small external stimuli. LCs have been regarded as unique functional soft materials from both scientific and technological point of view. The unique combination of counterintuitive properties, ie, order and fluidity, is not only an essential requirement for living matter, but also it is the foundation of the numerous technological applications of LC materials. Simultaneous exhibition of order and dynamics is the basic principle for self-organization and structure formation in living systems. Accordingly, LCs play a crucial role in living systems and in biology (18). For example, no life would be possible without the ordered and dynamic self-assembly of lipids into bilayers within the cell membrane. Several biological molecules such as lipids, carbohydrates, proteins, and nucleic acids have been found to exist in various liquid crystalline phases (26-34). The appearance of mesomorphism in DNAs has been related to the significant role that LCs would have played in the evolution of biological information in the pre-biotic world (35-38). LCs self-assemble into various structures with the help of many different types of molecular interactions such as van der Waals, dipolar and quadrupolar interaction, charge transfer, p-p interaction, metal coordination, and hydrogen bonding. Thus, LCs can be considered as prototype supramolecular systems which furnish well-defined self-assembled architectures using noncovalent secondary interactions (39). Scientifically, the LC field is a fertile ground to study supramolecular self-assembly of matter and soft materials. Moreover, LCs persuasively demonstrate the powerful organization principle of matter by maximizing the interaction energy and minimizing the excluded volume.Overall, LCs have developed into a fascinating and prosperous field, reaching out into different areas of science by providing basic knowledge of the fundamental rules governing self-assembly from simple to complex modes. The domains of LCs span across multiple disciplines of pure and applied science including optics, materials science, bioscience, nanoscience etc. Their science and technology are tru...

show abstract

Dendron-Mediated Self-Assembly, Disassembly, and Self-Organization of Complex Systems

Cited by 1,148 publications

References 1,304 publications

Synthetic regimes due to packing constraints in dendritic molecules confirmed by labelling experiments

Synthetic regimes due to packing constraints in dendritic molecules confirmed by labelling experiments

Functional liquid-crystalline polymers and supramolecular liquid crystals

Liquid Crystals

Contact Info

Product

Resources

About