15797-52-1Relevant articles and documents
Facile synthetic routes to phenylene and triazine core based dendritic cobaltabisdicarbollides
Dash, Barada Prasanna,Satapathy, Rashmirekha,Maguire, John A.,Hosmane, Narayan S.
, p. 5230 - 5235 (2010)
The synthesis and thermal properties of phenylene and triazine core based symmetrical macromolecules containing three to six cobaltabis(dicarbollide) clusters are reported. The zwitterionic oxonium derivative of cobaltabis(dicarbollide), [3,3′-Co(8-C4H8O 2-1,2-C2B9H10)(1′,2′- C2B9H11)], has been used for the synthetic transformations, and silicon tetrachloride and triflic acid were used as the cyclotrimerization reagents. Compounds containing multiple cobaltabis(dicarbollide) clusters are found to be extremely thermally stable, and only a 10-30% mass loss occurred up to 700 °C.
Novel electron-beam molecular resists with high resolution and high sensitivity for nanometer lithography
Kadota, Toshiaki,Kageyama, Hiroshi,Wakaya, Fujio,Gamo, Kenji,Shirota, Yasuhiko
, p. 706 - 707 (2004)
A novel class of chemically-amplified, electron-beam molecular resists for nanometer lithography were created. These molecular resists functioned as positive resists in the presence of an acid generator, exhibiting a high sensitivity of ≈2 μC cm-2/s
Hydroxyphenylbenzene derivatives as glass forming molecules for high resolution photoresists
Ober, Christopher K.,De Silva, Anuja
, p. 1903 - 1910 (2008)
This paper presents a fundamental study to relate molecular architecture to the amorphous properties of hydroxyphenylbenzene molecular glass derivatives. These studies demonstrates that the branched hydroxyphenylbenzene derivatives can form stable molecular glasses despite the π-π interactions present. Through this research, design concepts to stabilize the amorphous nature and to increase the glass transition temperature (Tg) based on asymmetric molecular structures, bulky substituents, conformation states and molecular size are explored. An understanding of such behavior is important for the development of hydroxyphenylbenzene derivatives as potential molecular photoresists for patterning below 50 nm. This research has helped to identify potential candidates to be evaluated as positive-tone photoresists for lithographic applications for extreme ultraviolet (EUV, λ = 13.4 nm) lithography. The first reported sub-30 nm feature sizes for hydroxyphenylbenzene derivatives were demonstrated with high Tg materials. The Royal Society of Chemistry.
Single-Crystalline MFI Zeolite with Sheet-Like Mesopores Layered along the a Axis
Zhang, Yunjuan,Shen, Xuefeng,Gong, Zheng,Han, Lu,Sun, Huai,Che, Shunai
, p. 738 - 742 (2019)
Designing a templating strategy for directing mesopore growth along different crystallographic directions is essential for fabricating two- or three-dimensional single-crystalline mesoporous zeolites. However, so far, mesopores formed in MFI zeolites by soft templates have mostly been generated by disrupting growth along the b axis; generating mesopores by disrupting growth along the a axis is rare. Herein, a single-crystalline mesoporous MFI zeolite (SCMMZ) with sheet-like mesopores layered along the a and b axes was synthesized using a triply branched surfactant with diquaternary ammonium groups connected to 1,3,5-triphenylbenzene by a six- and eight-carbon alkyl chain (TPB-6 and 8). The sheet-like mesopores were embedded in the MFI framework and were retained even after calcination. Molecular mechanics calculations provided evidence of low binding energy configurations of the surfactant that directed the growth of straight and zigzag channels along the b and a axes, respectively. The formation of nanosheets was attributed to the geometric matching of the arrangement of the aromatic groups to the zeolite framework.
Design and synthesis of C3-symmetric molecules containing oxepine and benzofuran moieties via Metathesis
Gupta, Naveen Kumar,Kotha, Sambasivarao,Solanke, Balaji. U.
, (2021/07/17)
We report a new synthetic strategy to C3-symmetric star-shaped phenyl and triazine central cores bearing oxepine and benzofuran ring systems. In this regard, we have explored the application of metathetic strategy to construct C3-sym
COMPOSITION FOR FILM FORMATION, FILM, RESIST UNDERLAYER FILM-FORMING METHOD, PRODUCTION METHOD OF PATTERNED SUBSTRATE, AND COMPOUND
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Paragraph 0194, (2019/04/14)
The composition for film formation includes a compound including a group of the formula (1) and a solvent. In the formula (1), R1 to R4 each independently represent a hydrogen atom, a monovalent organic group having 1 to 20 carbon at