The thermal phase behaviors of a series of newly designed 1-alkyl-3-methylimidazolium ionic liquids (ILs) of different chain length fatty acid carboxylate anions are investigated. The length of the alkyl chain of the carboxylate anion in IL influences the phase transition temperature of their crystalline solid phase and the mesophase stability. When the palmitate anion of the IL is replaced with palmitoyl ascorbate and palmitoyl-L-tryptophanate anions, its melting temperature decreases and eventually vanishes. The influence of structural modulation of ILs on their ionic conductivities is also studied. The interaction between the 1-alkyl-3-methylimidazolium cation and the fatty acid carboxylate anion is established by using ab initio based DFT calculations. The associated energies for single ion pair formation of these ILs are computed and are successfully correlated with the experimental findings, which finally leads to the most reasonable arrangement of the IL molecules in different phases.

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A designed orthogonal dual initiator is employed to construct poly(methyl methacrylate)‐block‐polytyrosine copolymer conjugates via the combination of atom‐transfer radical polymerization of methyl methacrylate, “click” chemistry and ring‐opening polymerization of tyrosine–α‐amino acid N‐carboxyanhydride monomer. The polymer–polypeptide conjugate undergoes self‐aggregation in dimethylformamide to produce hybrid micro/nanospheres owing to the formation of composite micelle as evidenced from field emission scanning electron microscopy and dynamic light scattering study. A simple solution‐based approach is described to encapsulate an organic dye (Rhodamine‐6G) into the aggregated hybrid micro/nanospheres.

A solution-phase reduction method is undertaken to produce polymer magnetic bimetallic CuNi nanoalloy with chain-like structures, which are formed by the magnetic dipole-directed assembly of spherical alloy nanoparticles as confirmed from TEM analysis. Magnetic property measurement reveals paramagnetic nature of the alloy nanochain. These polymer-capped chain-like alloy nanoparticles are dispersible in water as well as in organic solvents that increase their ease of application as catalyst in both of these environments. The XPS and zeta potential analysis demonstrates the presence of Cu(I) on the alloy particle surface and justifies their catalytic activity toward alkyne–azide click reactions. Consequently, the catalytic activity of the as-synthesized polymer CuNi alloy nanochain is investigated toward a wide variety of alkyne–azide click reactions at room temperature in water and in DMF. Depending upon the nature of the substrate and the surface stabilizing polymer on the nanocatalyst, a moderate to quantitative yield of the click-conjugated product is obtained. Additionally, the advantage of pseudohomogeneity of CuNi nanoalloy suspension is utilized to modify polymer end group with amino acid and peptide with ionic liquid via click reaction to create new bioconjugates. Moreover, the nanoalloy catalyst is magnetically recoverable and reusable up to three cycles of click reactions without losing much of its original activity.

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