I would like to know whether any other material is useful as absorption refrigerant other than lithium bromide and ammonia

I am R Rajamani teaching thermodynamics for chemical engineeers for more than two decades

Vapour absorption refrigeration systems using water-lithium bromide pair are
extensively used in large capacity air conditioning systems. In these systems water is
used as refrigerant and a solution of lithium bromide in water is used as absorbent.
Since water is used as refrigerant, using these systems it is not possible to provide
refrigeration at sub-zero temperatures. Hence it is used only in applications requiring
refrigeration at temperatures above 0o
C. Hence these systems are used for air
conditioning applications. The analysis of this system is relatively easy as the vapour
generated in the generator is almost pure refrigerant (water), unlike ammonia-water
systems where both ammonia and water vapour are generated in the generator.