Impact of “half-crown/two carbonyl”–Ca2+ metal ion interactions of a low molecular weight gelator (LMWG) on its fiber to nanosphere morphology transformation with a gel-to-sol phase transition†,Soft Matter

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Impact of “half-crown/two carbonyl”–Ca2+ metal ion interactions of a low molecular weight gelator (LMWG) on its fiber to nanosphere morphology transformation with a gel-to-sol phase transition†
Soft Matter ( IF 2.9 ) Pub Date : 2018-06-25 00:00:00 , DOI: 10.1039/c8sm01071d
Arunava Maity _{1,

2,

3,

4,

5} , Ananta Dey _{4,

5,

6,

7,

8} , Mrinal Kanti Si _{4,

5,

6,

7,

8} , Bishwajit Ganguly _{4,

5,

6,

7,

8} , Amitava Das _{4,

5,

6,

7,

8}

Affiliation

We report here a smart functional low molecular weight gelator (LMWG) L, containing an unusual metal ion coordination site, i.e. “half-crown/two carbonyl”. The gelator L shows excellent gelation behavior with typical fibrillar morphology in acetonitrile, methanol and ethanol media. Upon Ca²⁺ ion binding with its “half-crown/two carbonyl” coordination site, the acetonitrile gel of L exhibits a fiber to nanosphere morphology transformation along with a gel-to-sol phase transition as confirmed by microscopic investigation and by direct naked eye visualization, respectively. The mechanism involved in this morphology transformation and gel-to-sol phase transition process was studied thoroughly with the help of computational calculations and various spectroscopic experiments and discussed.

中文翻译：

低分子量胶凝剂（LMWG）的“半冠/二羰基” -Ca ²⁺金属离子相互作用对其从凝胶到溶胶相变的纤维向纳米球形态转化的影响†

我们在这里报告了一种智能功能性低分子量胶凝剂（LMWG）L，其中包含一个不寻常的金属离子配位位点，即“半冠/二羰基”。胶凝剂L在乙腈，甲醇和乙醇介质中表现出出色的胶凝行为，具有典型的原纤维形态。Ca ²⁺离子与其“半冠/两个羰基”配位键结合后，L的乙腈凝胶分别由显微镜研究和直接肉眼观察证实，其具有从纤维到纳米球的形态转变以及从凝胶到溶胶的相变。在计算计算和各种光谱实验的帮助下，彻底研究了这种形态转变和凝胶-溶胶-相转变过程的机理，并进行了讨论。

更新日期：2018-06-25

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