関連する実験動画

Updated: Feb 19, 2026

Preparation of Biomass-based Mesoporous Carbon with Higher Nitrogen-/Oxygen-chelating Adsorption for CuII Through Microwave Pre-Pyrolysis

Preparation of Biomass-based Mesoporous Carbon with Higher Nitrogen-/Oxygen-chelating Adsorption for CuII Through Microwave Pre-Pyrolysis

Published on: February 12, 2019

機械学習は,六角ボロンニトリド上のメロシアニン分子の吸収幾何学に関するグローバル検索を加速しました

Ritu Tomar¹, Thomas Bredow¹

¹Mulliken Center for Theoretical Chemistry, Clausius Institute of Physical and Theoretical Chemistry, University of Bonn, Bonn, Germany.

Journal of computational chemistry

|February 17, 2026

まとめ

機械学習とベイジアン最適化により,六角性ボロン窒化物 (hBN) の染料吸収を効率的にマッピングしました. この研究では,HB238染料は正面方向を好むが,2D素材では広範囲のサイト選択性を示していることが判明した.

科学分野:

マテリアルサイエンス材料科学
コンピューティング・ケミストリー
表面科学とは,地表科学である.

背景:

六角性ボロン窒化物 (hBN) は,2Dの断熱剤で,分子電子学の潜在的応用がある.
2D素材の有機染料の吸附振る舞いを理解することは,新しい電子機器の設計に不可欠です.

研究の目的:

hBN表面でのメロシアニン染料HB238の吸収を調査する.
機械学習 (ML) の使用と,複雑な吸収景観分析のためのグローバル検索戦略を探求する.

主な方法:

MACE (マテリアル・アクセラレーション・プラットホーム) の機械学習を用いた原子間ポテンシャルが,DFTデータに微調整された.
分子構成の探求のためにベイエスの最適化構造検索 (BOSS) を採用した.
有望な構造物の完全なPBE/D3幾何学最適化を行いました.

主要な成果:

HB238の好ましい面向吸附方向をhBNで特定し,中空の場所の近くには硫黄原子がある.
強いサイト選択性は観察されず,その結果,幅広い安定した構成が得られました.
共同吸収されたHB238分子が互いに平行に並んで表面に平坦に横たわっていることを発見しました.

結論:

組み合わせたMACEとBOSSのアプローチは,吸収現象を研究するための効率的で正確な方法を提供します.
この戦略は,二極性染料の2D断熱器の物理吸収に関する根本的な洞察を提供します.
この方法論は,様々な2D表面上の有機分子集積物の調査に適しています.

キーワード:

ベイジアン最適化ベイジアン最適化 DFT (デフォルト・ファイナンス・フォート) とはメイス (Mace) はメイス (Mace) です.ML ML MLは,多くのことを教えてくれます.メロシアナイン (Merocyanine) とは

さらに関連する動画

Detection and Recovery of Palladium, Gold and Cobalt Metals from the Urban Mine Using Novel Sensors/Adsorbents Designated with Nanoscale Wagon-wheel-shaped Pores

Detection and Recovery of Palladium, Gold and Cobalt Metals from the Urban Mine Using Novel Sensors/Adsorbents Designated with Nanoscale Wagon-wheel-shaped Pores

Published on: December 6, 2015

Microscopic Visualization of Porous Nanographenes Synthesized through a Combination of Solution and On-Surface Chemistry

Microscopic Visualization of Porous Nanographenes Synthesized through a Combination of Solution and On-Surface Chemistry

Published on: March 4, 2021

関連する概念動画

Hydroboration-Oxidation of Alkenes

Hydroboration-Oxidation of Alkenes

In addition to the oxymercuration–demercuration method, which converts the alkenes to alcohols with Markovnikov orientation, a complementary hydroboration-oxidation method yields the anti-Markovnikov product. The hydroboration reaction, discovered in 1959 by H.C. Brown, involves the addition of a B–H bond of borane to an alkene giving an organoborane intermediate. The oxidation of this intermediate with basic hydrogen peroxide forms an alcohol.

Radicals: Electronic Structure and Geometry

Radicals: Electronic Structure and Geometry

This lesson delves into the geometry of a radical, which is influenced by the electronic structure of the molecule. The principle is similar to that of a lone pair, where the unpaired electron influences the geometry at the radical center.
Accordingly, the structure of a trivalent radical lies between the geometries of carbocations and carbanions. An sp2-hybridized carbocation is trigonal planar, while an sp3-hybridized carbanion is trigonal pyramidal. Here, the difference in geometry is...

π Molecular Orbitals of 1,3-Butadiene

π Molecular Orbitals of 1,3-Butadiene

Conjugated dienes have lower heats of hydrogenation than cumulated and isolated dienes, making them more stable. The enhanced stabilization of conjugated systems can be understood from their π molecular orbitals.
The simplest conjugated diene is 1,3-butadiene: a four-carbon system where each carbon is sp2-hybridized and has an unhybridized p orbital that contains an unpaired electron. According to molecular orbital theory, atomic orbitals combine to form molecular orbitals such that the number...

Regioselectivity and Stereochemistry of Hydroboration

Regioselectivity and Stereochemistry of Hydroboration

A significant aspect of hydroboration–oxidation is the regio- and stereochemical outcome of the reaction.
Hydroboration proceeds in a concerted fashion with the attack of borane on the π bond, giving a cyclic four-centered transition state. The –BH2 group is bonded to the less substituted carbon and –H to the more substituted carbon. The concerted nature requires the simultaneous addition of –H and –BH2 across the same face of the alkene giving syn stereochemistry.

VSEPR Theory and the Effect of Lone Pairs

VSEPR Theory and the Effect of Lone Pairs

Effect of Lone Pairs of Electrons on Molecule Geometry

Hybridization of Atomic Orbitals I

Hybridization of Atomic Orbitals I

The mathematical expression known as the wave function, ψ, contains information about each orbital and the wavelike properties of electrons in an isolated atom. When atoms are bound together in a molecule, the wave functions combine to produce new mathematical descriptions that have different shapes. This process of combining the wave functions for atomic orbitals is called hybridization and is mathematically accomplished by the linear combination of atomic orbitals. The new orbitals that...