Abstract
The process of molecular recognition is the assembly of two or more molecules through weak interactions. Information in the process of molecular recognition can be transmitted to us via physical signals, which may find applications in sensing and switching. The conventional signals are mainly limited to light signal. Here, we describe the recognition of diols with Cu(1,10-phenlothroline)2SeO4 and the transduction of discrete recognition events into dielectric and/or ferroelectric signals. We observe that systems of Cu(1,10-phenlothroline)2SeO4·(diol) exhibit significant dielectric and/or ferroelectric dependence on different diol molecules. The compounds including ethane-1,2-diol or propane-1,2-diol just show small temperature-dependent dielectric anomalies and no reversible polarization, while the compound including ethane-1,3-diol shows giant temperature-dependent dielectric anomalies as well as ferroelectric reversible spontaneous polarization. This finding shows that dielectricity and/or ferroelectricity has the potential to be used for signalling molecular recognition.
Highlights
The process of molecular recognition is the assembly of two or more molecules through weak interactions
Molecular recognition is the weak binding of a guest molecule to a complementary host molecule to form a host–guest complex through non-covalent bonding interactions such as hydrogen bonding, p–p stacking, metal coordination, hydrophobic forces and cation–p interaction[1,2,3,4,5,6]
One of the characteristic features of the host–guest systems is that the guest molecule has large freedom of motion because of the weak binding interaction and spacious room for molecular motion
Summary
The process of molecular recognition is the assembly of two or more molecules through weak interactions. They were found to undergo temperature-triggered structural phase transitions by thermal analysis (Supplementary Fig. 1) and dielectric measurements. The high-temperature phase (HTP) structure at 353 K has the centrosymmetric space group a b
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