超越过渡区块金属:探索素PTA及其氧化物[PTA(O) ]对的反应性
Antonella Guerriero1, Andrea Ienco1, Thomas Hicks2
1Consiglio Nazionale delle Ricerche, Istituto di Chimica dei Composti OrganoMetallici (ICCOM) Via Madonna del Piano 10 50019 Sesto Fiorentino (Florence) Italy antonella.guerriero@iccom.cnr.it.
RSC advances
|July 5, 2024
概括
研究人员探索了水溶性酸PTA及其氧化物与化的反应. 他们发现N-mono-protonated phosphine盐形成,而不是协调复合体,由于弱化的Ga-P键.
科学领域:
- 无机化学 无机化学 有机化学
- 有机金属化学 有机金属化学
- 材料科学 材料科学 材料科学
背景情况:
- 1,3,5-triaza-7-phosphaadamantane (PTA) 是一种水溶性状的氨酸,具有独特的协调特性.
- (III) 化物 (GaCl3,GaI3) 是易斯酸前体,在催化和材料中具有潜在的应用.
- 了解PTA与等主要组金属的反应性对于开发新的功能材料至关重要.
研究的目的:
- 首次研究PTA及其氧化物衍生物[PTA(O]与(III) 化物 (GaCl3和GaI3) 的反应性.
- 描述产生的产品并阐明PTA与Ga(III) 离子的协调行为.
- 通过计算来评估-键的强度和潜在复合物的热力学稳定性.
主要方法:
- 在各种反应条件下合成-素化合物.
- 使用多核NMR光谱 (1H, 13C{1H}, 31P{1H}, 71Ga),FT-IR光谱和X射线晶体衍射进行了表征.
- 密度函数理论 (DFT) 计算来分析粘合和稳定性.
主要成果:
- 在所有反应中都观察到与[GaCl4]-或[I]- counterions 形成N-mono-protonated 氨酸盐.
- 没有形成协调的Ga-PTA或Ga-[PTA(O) ]复合体.
- 合成的酸盐是稳定的,并且在室温下在水溶液中高度溶解.
- 据DFT计算,P-Ga债券显著弱于P-金属转型金属债券 (约两倍).
- PTA或[PTA(O) 的单质子化使离子-PTA协调复合物的形成在热力学上不利.
结论:
- 由于PTA和[PTA(O]与Ga(III) 化物之间的反应性,主要导致盐的形成,而不是直接的协调.
- P-Ga 键的固有弱点和由质子化诱导的热力学不稳定性阻止了稳定的 Ga-PTA 复合物的形成.
- 由此产生的水溶性-酸盐代表了一种新型的化合物类别,在水系统中具有潜在的应用.
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