Dramatic Stabilization of a Hexagonal Columnar Mesophase Generated from Supramolecular and Macromolecular Columns by the Semifluorination of the Alkyl Groups of Their Tapered Building Blocks

Percéc, Virgil; Schlueter, D.; Kwon, Yong Ku; Blackwell, John; Moeller, Martin; Slangen, P.J.

doi:10.1021/ma00130a013

Cited by 126 publications

(87 citation statements)

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“…Some of the early investigations showed that rod-like liquid crystals with perfluorinated side chains, comparing to the ones with only alkyl side chains, through the "fluorophilic effects," are stiffer, miscible, and exhibit superior properties: including smectic layer assembling enhancements, high clearing points, broad mesomorphic temperature ranges, and so on (8). As a result, the fluorinated alkyl chains had recently been applied in DLCs with the hopes of improving their liquid crystal properties (9)(10)(11)(12)(13)(14)(15)(16)(17)(18)(19)(20)(21)(22)(23)(24)(25).…”

Section: Introductionmentioning

confidence: 99%

Synthesis and Mesomorphism of Triphenylene Discotic Liquid Crystals Containing Fluorinated Chains

Chen¹,

Zhao²,

Wang³

et al. 2011

Soft Materials

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The compounds were characterized by using nuclear magnetic resonance (NMR), elemental analysis, and mass. Thermal gravimetry analysis (TGA) showed that the FTPDLCs were thermally stable until 300 • C. Differential scanning calorimerty (DSC) and polarized optical microscopy (POM) investigations of the mesomorphism found that the FTPDLCs exhibited enantiotropic hexagonal columnar mesophase (Col h ) and had much higher clear points than the corresponding hexaalkoxytriphenylenes, C 18 H 6 (OR) 6 . Noticeably, semi-quantitative studies showed that the number of fluorinated ester chains on the triphenylene core was directly proportional to FTPDLCs' clearing points and the order of hexagonal columnar mesophases. In addition, FTPDLCs' mesomorphism was found to be affected by molecular symmetry and by the relative length between the semi-fluorinated chains and the alkoxy chains. Most importantly, we further proved that the mesomorphism of TPDLCs could be better improved through introducing fluorinated ester chains than the ether chains as reported previously.

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Section: Introductionmentioning

confidence: 99%

Synthesis and Mesomorphism of Triphenylene Discotic Liquid Crystals Containing Fluorinated Chains

Chen¹,

Zhao²,

Wang³

et al. 2011

Soft Materials

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“…The association between these two polymers opens the way to various industrial applications. In addition, owing to the fluorophobic effect, the self‐assembly of semifluorinated compounds can be induced into supramolecular architectures9–20 such as liquid crystals and supramolecular soft matter, some of which may be suitable for electronic and optoelectronic applications.…”

Section: Introductionmentioning

confidence: 99%

Association of immunoglobulin‐like transcript 6 deficiency with Sjögren's syndrome

Kabalak

Dobberstein

Tenbusch

et al. 2009

Arthritis & Rheumatism

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“…The influence of the structure of the ion‐pair of the ionic liquid on thermal and thermodynamic stability of the supramolecular dendrimers will be demonstrated with two AB 3 first generation dendrons, (3,4,5) 12G1‐CH 2 Y and (4‐3,4,5) 12G1‐CH 2 Y (where Y is the ionic liquid functionality attached to the apex of the dendron), three AB 2 second generation dendrons, (3,4‐3,5)12G2‐CH 2 Y , (4‐3,4‐3,5)12G2‐CH 2 Y , and (4‐3,4,5‐3,5)12G2‐CH 2 Y , and with an AB 2 third generation dendron, (3,4‐3,5‐3,5)12G3‐CH 2 Y . Both in the supramolecular columns and spheres the noncovalent interactions mediated by the ionic liquid provide a supramolecular polymer and, therefore, these assemblies represent dendronized supramolecular polymers 60–84…”

Section: Introductionmentioning

confidence: 99%

Histologic grade is correlated with outcome after resection of hepatic neuroendocrine neoplasms

Cho

Labow

Tang

et al. 2008

Cancer

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BACKGROUND.The behavior of neuroendocrine neoplasms is poorly defined, and predictors of outcome after surgical resection have yet to be identified. Consequently, guidelines for treatment remain unclear. Current pathologic classification systems do not permit meaningful discrimination of hepatic neuroendocrine neoplasms.METHODS.The authors reviewed prospectively maintained databases from 2 institutions of patients who underwent hepatic resection for neuroendocrine neoplasms between 1990 and 2006. Patient, tumor, and operative characteristics were analyzed to identify factors associated with overall survival, progression‐free survival, and symptom control. Hepatic neoplasms were stratified by using a 3‐tier pathologic classification system based on the number of mitotic figures and the presence of tumor necrosis that was recently validated for pancreatic neuroendocrine neoplasms.RESULTS.Seventy patients were identified from the databases. Low‐grade, intermediate‐grade, and high‐grade neoplasms were identified in 53%, 37%, and 10% of patients, respectively. After a median follow‐up of 51 months, the median overall survival for all patients was 91 months, and it was 108 months when 7 patients with high‐grade neuroendocrine carcinomas were excluded. Progressive disease was eventually observed in 81% of patients, and the median progression‐free survival was 17 months. The median time to the onset of symptoms was 39 months for patients who presented with hormonal symptoms and 80 months for all patients. Histologic grade was associated with poorer overall and progression‐free survival.CONCLUSIONS.When performed in a context of aggressive multimodality therapy, long‐term outcomes after partial hepatectomy for hepatic neuroendocrine neoplasms were favorable; however, disease progression was eventually observed in the majority of patients. Several oncologic variables were associated with significant differences in survival after resection. A novel pathologic classification system appears to enhance prognostic stratification of patients with hepatic neuroendocrine neoplasms. Cancer 2008. © 2008 American Cancer Society.

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Dramatic Stabilization of a Hexagonal Columnar Mesophase Generated from Supramolecular and Macromolecular Columns by the Semifluorination of the Alkyl Groups of Their Tapered Building Blocks

Abstract: The tapered building blocks 3,4,5-tris[(4-(n.-decan-l-yloxy)benzyl)oxy]benzoic acid (8-10/0), 3,4,5-tris[(4-((

Cited by 126 publications

References 1 publication

Synthesis and Mesomorphism of Triphenylene Discotic Liquid Crystals Containing Fluorinated Chains

Synthesis and Mesomorphism of Triphenylene Discotic Liquid Crystals Containing Fluorinated Chains

Association of immunoglobulin‐like transcript 6 deficiency with Sjögren's syndrome

Histologic grade is correlated with outcome after resection of hepatic neuroendocrine neoplasms

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