Binding Gibbs energy of ionic liquids to calf thymus DNA: a fluorescence spectroscopy study
Literature Information
Huiyong Wang, Jianji Wang, Shibiao Zhang
The binding constants and binding Gibbs energies of [Cnmim]Br (n = 4, 6, 8, 10, 12) and [C4mim][BF4] to calf thymus DNA-D1501 have been determined by the fluorescence measurements of the pyrene probe. It was found that values of the binding Gibbs energy decrease linearly with the increase of alkyl chain length of the ILs. Based on this observation, Gibbs energies for both the interaction between DNA and –CH2– of the ILs and the interaction between DNA and the cationic head group of the ILs have been reported. The result suggests that electrostatic interaction between DNA and the cationic head group of the ILs is predominant for the binding of the ILs with DNA although contribution from the non-electrostatic interaction between DNA and the alkyl chain of the ILs increases with increasing alkyl chain length of the ILs. The information obtained here may have application in the design of novel ILs-based DNA extraction/separation systems.
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Physical Chemistry Chemical Physics

Physical Chemistry Chemical Physics (PCCP) is an international journal co-owned by 19 physical chemistry and physics societies from around the world. This journal publishes original, cutting-edge research in physical chemistry, chemical physics and biophysical chemistry. To be suitable for publication in PCCP, articles must include significant innovation and/or insight into physical chemistry; this is the most important criterion that reviewers and Editors will judge against when evaluating submissions. The journal has a broad scope and welcomes contributions spanning experiment, theory, computation and data science. Topical coverage includes spectroscopy, dynamics, kinetics, statistical mechanics, thermodynamics, electrochemistry, catalysis, surface science, quantum mechanics, quantum computing and machine learning. Interdisciplinary research areas such as polymers and soft matter, materials, nanoscience, energy, surfaces/interfaces, and biophysical chemistry are welcomed if they demonstrate significant innovation and/or insight into physical chemistry. Joined experimental/theoretical studies are particularly appreciated when complementary and based on up-to-date approaches.











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