极性醇衍生物诱导的二次波反应在混合甲酸盐中,具有可逆光色
Ting-Jie Wang1, Jin-Shuang Guo2,3, Ning-Ning Zhang4
1Key Laboratory of Chemical Sensing & Analysis in Universities of Shandong, School of Chemistry and Chemical Engineering, University of Jinan, Jinan, Shandong250022, P. R. China.
Inorganic chemistry
|September 23, 2024
概括
研究人员使用 thiazole 衍生物开发了新的混合合物晶体. 这些材料表现出强烈的第二和生成 (SHG) 和可逆光色,克服了以前在晶体排列控制方面的局限性.
科学领域:
- 材料科学 材料科学 材料科学
- 晶体学 晶体学是指结晶学.
- 光电学是指光电子产品.
背景情况:
- 无机有机杂交甲化物对二次非线性光学 (NLO) 应用具有前景,这是由于Bi (III) 的ns2电子.
- 控制甲化物图案的排列是具有挑战性的,这限制了NLO活性材料的发现.
研究的目的:
- 设计和合成使用功能化 thiazole 衍生物的新型混合晶体 bismuth 化物 NLO.
- 为了研究分子结构,晶体排列和NLO特性之间的关系.
主要方法:
- 提亚衍生物的设计采用极性捐赠者-π-接受器系统.
- 合成和结晶学分析混合合物甲化物 (Hhpt) [BiCl6].
- 实验和理论计算以了解NLO响应的起源.
主要成果:
- 合成的 (Hhpt) [BiCl6]结晶成一个极性单临床P21空间组.
- 该材料表现出强烈的第二波生成 (SHG) 响应.
- 与NLO属性一起观察到可逆光色行为.
结论:
- 极性 thiazole 衍生物可以有效地诱导混合芝麻化物中的 SHG 活性.
- 有机部分和无机[BiCl6]3-单位之间的协同效应对于观察到的NLO特性至关重要.
- 这项工作提供了SHG活性混合合物合物与可逆光色相结合的第一个例子,由极性 thiazole 衍生物驱动.
更多相关视频
相关概念视频
01:26Thermal and Photochemical Electrocyclic Reactions: Overview
2.3K
Electrocyclic reactions are reversible reactions. They involve an intramolecular cyclization or ring-opening of a conjugated polyene. Shown below are two examples of electrocyclic reactions. In the first reaction, the formation of the cyclic product is favored. In contrast, in the second reaction, ring-opening is favored due to the high ring strain associated with cyclobutene formation.
2.3K
01:26Photochemical Electrocyclic Reactions: Stereochemistry
1.8K
The absorption of UV–visible light by conjugated systems causes the promotion of an electron from the ground state to the excited state. Consequently, photochemical electrocyclic reactions proceed via the excited-state HOMO rather than the ground-state HOMO. Since the ground- and excited-state HOMOs have different symmetries, the stereochemical outcome of electrocyclic reactions depends on the mode of activation; i.e., thermal or photochemical.
Selection Rules: Photochemical Activation
Selection Rules: Photochemical Activation
1.8K
01:12Cycloaddition Reactions: MO Requirements for Photochemical Activation
2.0K
Some cycloaddition reactions are activated by heat, while others are initiated by light. For example, a [2 + 2] cycloaddition between two ethylene molecules occurs only in the presence of light. It is photochemically allowed but thermally forbidden.
2.0K
02:46Halogenation of Alkenes
15.4K
Halogenation is the addition of chlorine or bromine across the double bond in an alkene to yield a vicinal dihalide. The reaction occurs in the presence of inert and non-nucleophilic solvents, such as methylene chloride, chloroform, or carbon tetrachloride.
Consider the bromination of cyclopentene. Molecular bromine is polarized in the proximity of the π electrons of cyclopentene. An electrophilic bromine atom adds across the double bond, forming a cyclic bromonium ion intermediate.
Consider the bromination of cyclopentene. Molecular bromine is polarized in the proximity of the π electrons of cyclopentene. An electrophilic bromine atom adds across the double bond, forming a cyclic bromonium ion intermediate.
15.4K
01:17Thermal Electrocyclic Reactions: Stereochemistry
2.0K
The stereochemistry of electrocyclic reactions is strongly influenced by the orbital symmetry of the polyene HOMO. Under thermal conditions, the reaction proceeds via the ground-state HOMO.
Selection Rules: Thermal Activation
Conjugated systems containing an even number of π-electron pairs undergo a conrotatory ring closure. For example, thermal electrocyclization of (2E,4E)-2,4-hexadiene, a conjugated diene containing two π-electron pairs, gives trans-3,4-dimethylcyclobutene.
Selection Rules: Thermal Activation
Conjugated systems containing an even number of π-electron pairs undergo a conrotatory ring closure. For example, thermal electrocyclization of (2E,4E)-2,4-hexadiene, a conjugated diene containing two π-electron pairs, gives trans-3,4-dimethylcyclobutene.
2.0K
01:11Reactions at the Benzylic Position: Halogenation
2.4K
Benzylic halogenation takes place under conditions that favor radical reactions such as heat, light, or a free radical initiator like peroxide.
2.4K