AIMNet2-NSE:一个可转移的反应性神经网络潜力,用于开放化学
Bhupalee Kalita1, Roman Zubatyuk1, Dylan M Anstine2
1Department of Chemistry, Carnegie Mellon University, Pittsburgh, PA, 15213, United States.
Angewandte Chemie (International ed. in English)
|December 16, 2025
概括
AIMNet2-NSE是一个新的机器学习潜力,通过结合自旋电荷平衡,准确地模拟开放外的激素化学. 这一进步使复杂化学反应和中间体的有效探索成为可能,克服了传统方法的局限性.
科学领域:
- 计算化学计算化学
- 材料科学 材料科学 材料科学
- 化学工程是化学工程的重要组成部分.
背景情况:
- 包括激素中间体在内的开系统在聚合,燃烧和催化等各种化学过程中至关重要.
- 由于这些系统的复杂自旋状态,准确的计算建模具有挑战性.
- 现有的机器学习原子间潜力往往无法解释自旋倍数,限制了它们在反应化学中的应用.
研究的目的:
- 开发一种新的机器学习原子间潜力,AIMNet2-NSE (神经自旋电荷平衡),能够准确地处理具有任意电荷和自旋倍数的分子和反应.
- 为了能够高效,准确地建模开放基化学,这是传统量子力学方法的计算禁止.
主要方法:
- AIMNet2-NSE是基于AIMNet2框架构建的,包含一个旋转电荷平衡机制.
- 该模型是基于2000万封闭外分子,1300万开放外激素配置和20万个激素反应概况的广泛数据集进行训练的.
- 对自旋电荷的明确处理允许预测自旋解析的属性.
主要成果:
- AIMNet2-NSE实现了近密度函数理论 (DFT) 准确性,用于自旋解析的属性.
- 该模型表现出有利的线性缩放,显著优于传统电子结构方法的多项式缩放.
- 对激素测试组,BASChem19基准和激素聚合反应的评估显示出强大的预测能力和概括性.
结论:
- AIMNet2-NSE代表了机器学习在开放系统的原子间潜力的重大进步.
- 该模型有助于有效地探索复杂的激素反应途径和反应性中间体.
- 这项工作克服了计算的局限性,使其能够在涉及激素化学的化学和工业过程中得到更广泛的应用.
相关概念视频
02:59The Nernst Equation
46.4K
Nonstandard Reaction Conditions
The interconnection between standard cell potentials and various thermodynamic parameters such as the standard free energy change ΔG° and equilibrium constant K has been previously explored. For example, a redox reaction involving zinc(II) and tin(II) ions at 1 M concentration with Eºcell = +0.291 V and ΔG° = −56.2 kJ is spontaneous.
The interconnection between standard cell potentials and various thermodynamic parameters such as the standard free energy change ΔG° and equilibrium constant K has been previously explored. For example, a redox reaction involving zinc(II) and tin(II) ions at 1 M concentration with Eºcell = +0.291 V and ΔG° = −56.2 kJ is spontaneous.
46.4K
01:08Types of Chemical Reactions: Exchange and Reversible
10.2K
An exchange reaction is a chemical reaction in which both synthesis and decomposition occur, chemical bonds are both formed and broken, and chemical energy is absorbed, stored, and released.
A special kind of exchange reaction is the oxidation-reduction reaction, or the redox reaction. These reactions involve the transfer of electrons from one compound to another. The electrons in these reactions commonly come from hydrogen atoms, which consist of an electron and a proton. A molecule gives up a...
A special kind of exchange reaction is the oxidation-reduction reaction, or the redox reaction. These reactions involve the transfer of electrons from one compound to another. The electrons in these reactions commonly come from hydrogen atoms, which consist of an electron and a proton. A molecule gives up a...
10.2K
01:28Electrical Synapses
10.0K
Electrical synapses found in all nervous systems play important and unique roles. In these synapses, the presynaptic and postsynaptic membranes are very close together (3.5 nm) and are actually physically connected by channel proteins forming gap junctions.
Gap junctions allow the current to pass directly from one cell to the next. In contrast, in the chemical synapse, the neurotransmitters carry the information through the synaptic cleft from one neuron to the next. They consist of two...
Gap junctions allow the current to pass directly from one cell to the next. In contrast, in the chemical synapse, the neurotransmitters carry the information through the synaptic cleft from one neuron to the next. They consist of two...
10.0K
01:28Neuronal Communication
2.9K
Neurons, the fundamental units of the brain and nervous system, communicate through complex electrochemical signals that underpin all cognitive and bodily functions. This communication is primarily facilitated by a process involving the generation and propagation of an action potential along the axon of the neuron. When the internal electrical charge of a neuron surpasses a certain threshold, an action potential is triggered. This rapid change in voltage travels swiftly along the axon to the...
2.9K
01:26Chemical Synapses
4.2K
Chemical synapses are specialized sites between two neurons or between a neuron and a non-neuronal cell like a muscle, glandular or sensory cell.
Because chemical synapses depend on the release of neurotransmitter molecules from synaptic vesicles to pass on their signal, there is an approximately one millisecond delay between when the axon potential reaches the presynaptic terminal and when the neurotransmitter leads to opening of postsynaptic ion channels. Additionally, this signaling is...
Because chemical synapses depend on the release of neurotransmitter molecules from synaptic vesicles to pass on their signal, there is an approximately one millisecond delay between when the axon potential reaches the presynaptic terminal and when the neurotransmitter leads to opening of postsynaptic ion channels. Additionally, this signaling is...
4.2K
01:26Chemical Synapses
11.1K
Chemical synapses are specialized sites between two neurons or between a neuron and a non-neuronal cell like a muscle, glandular or sensory cell.
Because chemical synapses depend on the release of neurotransmitter molecules from synaptic vesicles to pass on their signal, there is an approximately one millisecond delay between when the axon potential reaches the presynaptic terminal and when the neurotransmitter leads to opening of postsynaptic ion channels. Additionally, this signaling is...
Because chemical synapses depend on the release of neurotransmitter molecules from synaptic vesicles to pass on their signal, there is an approximately one millisecond delay between when the axon potential reaches the presynaptic terminal and when the neurotransmitter leads to opening of postsynaptic ion channels. Additionally, this signaling is...
11.1K