Table 1.

Singular change to cation chain length leading to altered physicochemical profile. IL—ionic liquid.

Chain Length Alteration	Change on Physio-Chemical Properties of ILs	Reference
Increase	Increased viscosity	[6,30]
	Increase enthalpy of vaporization	[6]
	Increased aggregation (not necessarily ordered)	[6,30,31]
	Increased toxicity (bacterial and marine ecosystems)	[3,32]
	Increased surfactant activity	[6]
Chain lengths similar to biological membranes	Increased bioaccumulation (potential for toxicity)	[3,20]
Decrease	Increased conductance	[6]
	Increase in electrostatic forces	[6,30]
	Ordered aggregation; depends largely on polarity and geometric packing	[6,31]
	Increased lipase catalytic activity	[19,33]
	Increased polarity	[6]