On‐Surface Synthesis of Cumulene‐Containing Polymers via Two‐Step Dehalogenative Homocoupling of Dibromomethylene‐Functionalized Tribenzoazulene
作者:José I. Urgel、Marco Di Giovannantonio、Kristjan Eimre、Thorsten G. Lohr、Junzhi Liu、Shantanu Mishra、Qiang Sun、Amogh Kinikar、Roland Widmer、Samuel Stolz、Max Bommert、Reinhard Berger、Pascal Ruffieux、Carlo A. Pignedoli、Klaus Müllen、Xinliang Feng、Roman Fasel
DOI:10.1002/anie.202001939
日期:2020.8.3
on‐surface synthesis of a polymer linked by cumulene‐like bonds on a Au(111) surface via sequential thermally activated dehalogenative C−C coupling of a tribenzoazulene precursor equipped with two dibromomethylene groups. The structure and electronic properties of the resulting polymer with cumulene‐like pentagon–pentagon and heptagon–heptagon connections have been investigated by means of scanning probe microscopy
Compound for Resist and Radiation-Sensitive Composition
申请人:Echigo Masatoshi
公开号:US20080113294A1
公开(公告)日:2008-05-15
A radiation-sensitive composition containing 1 to 80% by weight of a solid component and 20 to 99% by weight of a solvent. The solid component contains a compound B which has (a) a structure derived from a polyphenol compound A by introducing an acid-dissociating group to at least one phenolic hydroxyl group of the polyphenol compound A which is synthesized by a condensation between a di- to tetrafunctional aromatic ketone or aromatic aldehyde each having 5 to 36 carbon atoms with a compound having 1 to 3 phenolic hydroxyl groups and 6 to 15 carbon atoms, and (b) a molecular weight of 400 to 2000. The composition containing the compound B is useful as an acid-amplified, non-polymeric resist material, because it is highly sensitive to radiation such as KrF excimer lasers, extreme ultraviolet rays, electron beams, and X-rays, and provides resist patterns with a high resolution, high heat resistance, and high etching resistance.
COMPOUND FOR RESIST AND RADIATION-SENSITIVE COMPOSITION
申请人:ECHIGO Masatoshi
公开号:US20110165516A1
公开(公告)日:2011-07-07
A radiation-sensitive composition containing 1 to 80% by weight of a solid component and 20 to 99% by weight of a solvent. The solid component contains a compound B which has (a) a structure derived from a polyphenol compound A by introducing an acid-dissociating group to at least one phenolic hydroxyl group of the polyphenol compound A which is synthesized by a condensation between a di- to tetrafunctional aromatic ketone or aromatic aldehyde each having 5 to 36 carbon atoms with a compound having 1 to 3 phenolic hydroxyl groups and 6 to 15 carbon atoms, and (b) a molecular weight of 400 to 2000. The composition containing the compound B is useful as an acid-amplified, non-polymeric resist material, because it is highly sensitive to radiation such as KrF excimer lasers, extreme ultraviolet rays, electron beams, and X-rays, and provides resist patterns with a high resolution, high heat resistance, and high etching resistance.
Benzo‐Extended Cyclohepta[
<i>def</i>
]fluorene Derivatives with Very Low‐Lying Triplet States
作者:Fupeng Wu、Ji Ma、Federico Lombardi、Yubin Fu、Fupin Liu、Zhijie Huang、Renxiang Liu、Hartmut Komber、Dimitris I. Alexandropoulos、Evgenia Dmitrieva、Thorsten G. Lohr、Noel Israel、Alexey A. Popov、Junzhi Liu、Lapo Bogani、Xinliang Feng
DOI:10.1002/anie.202202170
日期:2022.6.7
Three open-shell non-alternant polycyclic hydrocarbons (PHs) based on the skeleton of cyclohepta[def]fluorene are synthesized via an efficient benzannulation stabilization strategy. The obtained persistent singlet diradcialoids have a narrow optical energy gap (0.52–0.69 eV). Moreover, variable-temperature EPR measurements indicate that all of them have a low-lying triplet state with an extremely small
We describe herein an intriguing method for the synthesis of biaryl aldehydes bearing both axial and central chirality through a desymmetric [3 + 2] cycloaddition reaction of activated isocyanides with prochiral biaryl dialdehydes under silver catalysis. This protocol features excellent enantioselectivity, 100% atom economy, good functional group compatibility, and operational simplicity.