高分子同质性和协调网络中的结构灵活性,由杆构建块维持
Yassin H Andaloussi1, Andrey A Bezrukov1, Debobroto Sensharma1
1Department of Chemical Sciences, Bernal Institute, University of Limerick Limerick V94 T9PX Republic of Ireland xtal@ul.ie.
CrystEngComm
|July 26, 2023
概括
研究人员开发了一种新的链接器,PyImPr,创建2D和3D协调网络Cd的异构体 (PyImPr) 2. 这些同位素在去除溶剂后表现出不可逆转的结构转变,为晶体工程提供了洞察力.
科学领域:
- 协调化学 协调化学
- 超分子化学 超分子化学
- 材料科学 材料科学 材料科学
背景情况:
- 双功能N-捐赠体碳酸盐链接器是形成协调网络与dia和sql拓学的关键.
- 这些网络基于MN2(CO2) 2分子构建块 (MBB).
研究的目的:
- 为了引入一种新的N-捐赠者碳酸盐链接剂,β-(3,4-pyridinedicarboximido) propionate (PyImPr).
- 使用PyImPr和研究协调网络异构体的形成.
- 探索由此产生的协调化合物的结构灵活性和转变.
主要方法:
- 使用PyImPr和酸合成 ((II) 协调复合物.
- 通过分层和溶热方法制备2D和3D超分子异构体.
- 单晶X射线衍射用于结构分析.
- 剑桥结构数据库 (CSD) 调查用于拓分析.
主要成果:
- 新的链接器PyImPr形成了Cd(PyImPr) 2,根据制备方法产生了不同的2D和3D超分子异构体.
- 这两种异构体共享相同的碳酸盐桥梁杆构建块 (RBB).
- 在去除溶剂后观察到不可逆转的开放到闭合的结构转变.
结论:
- 在PyImPr中的乙烯部分有助于结构灵活性,导致可逆转变.
- 该研究通过分析相关协调网络中的RBB拓,提供了对晶体工程的见解.
更多相关视频
09:34Synthesis of Information-bearing Peptoids and their Sequence-directed Dynamic Covalent Self-assembly
Published on: February 6, 2020
7.3K
10:52Line Shape Analysis of Dynamic NMR Spectra for Characterizing Coordination Sphere Rearrangements at a Chiral Rhenium Polyhydride Complex
Published on: July 27, 2022
2.8K
相关概念视频
02:34Structural Isomerism
19.4K
Isomerism in Complexes
Isomers are different chemical species that have the same chemical formula. Structural isomerism of coordination compounds can be divided into two subcategories, the linkage isomers and coordination-sphere isomers.
Linkage isomers occur when the coordination compound contains a ligand that can bind to the transition metal center through two different atoms. For example, the CN− ligand can bind through the carbon atom or through the nitrogen atom. Similarly, SCN− can...
Isomers are different chemical species that have the same chemical formula. Structural isomerism of coordination compounds can be divided into two subcategories, the linkage isomers and coordination-sphere isomers.
Linkage isomers occur when the coordination compound contains a ligand that can bind to the transition metal center through two different atoms. For example, the CN− ligand can bind through the carbon atom or through the nitrogen atom. Similarly, SCN− can...
19.4K
02:52Stereoisomerism
12.2K
Isomerism in Complexes
Isomers are different chemical species that have the same chemical formula.
Transition metal complexes often exist as geometric isomers, in which the same atoms are connected through the same types of bonds but with differences in their orientation in space. Coordination complexes with two different ligands in the cis and trans positions from a ligand of interest form isomers. For example, the octahedral [Co(NH3)4Cl2]+ ion has two isomers (Figure 1) In the cis...
Isomers are different chemical species that have the same chemical formula.
Transition metal complexes often exist as geometric isomers, in which the same atoms are connected through the same types of bonds but with differences in their orientation in space. Coordination complexes with two different ligands in the cis and trans positions from a ligand of interest form isomers. For example, the octahedral [Co(NH3)4Cl2]+ ion has two isomers (Figure 1) In the cis...
12.2K
02:42Valence Bond Theory
8.8K
Coordination compounds and complexes exhibit different colors, geometries, and magnetic behavior, depending on the metal atom/ion and ligands from which they are composed. In an attempt to explain the bonding and structure of coordination complexes, Linus Pauling proposed the valence bond theory, or VBT, using the concepts of hybridization and the overlapping of the atomic orbitals. According to VBT, the central metal atom or ion (Lewis acid) hybridizes to provide empty orbitals of suitable...
8.8K
02:57Coordination Number and Geometry
16.1K
For transition metal complexes, the coordination number determines the geometry around the central metal ion. Table 1 compares coordination numbers to molecular geometry. The most common structures of the complexes in coordination compounds are octahedral, tetrahedral, and square planar.
16.1K
03:02Colors and Magnetism
11.9K
Color in Coordination Complexes
When atoms or molecules absorb light at the proper frequency, their electrons are excited to higher-energy orbitals. For many main group atoms and molecules, the absorbed photons are in the ultraviolet range of the electromagnetic spectrum, which cannot be detected by the human eye. For coordination compounds, the energy difference between the d orbitals often allows photons in the visible range to be absorbed and emitted, which is seen as colors by the human...
When atoms or molecules absorb light at the proper frequency, their electrons are excited to higher-energy orbitals. For many main group atoms and molecules, the absorbed photons are in the ultraviolet range of the electromagnetic spectrum, which cannot be detected by the human eye. For coordination compounds, the energy difference between the d orbitals often allows photons in the visible range to be absorbed and emitted, which is seen as colors by the human...
11.9K