Photodissociation and recombination dynamics of ICl- in condensed-phase environments is studied theoretically by a linear-chain model consisting of a diatom in a chain of rare-gas atoms. We use a hybrid quantum/ classical scheme, where the dynamics of the solute is treated by time-dependent quantum mechanics, while the motions of the solvent atoms are described classically. The dynamics of the heteronuclear diatomic ion, ICl-, is much more complex compared with those for the homonuclear (I-2(-)) case. The photodissociation dynamics of the model system /(Ar)(50)[Cl-I]-(Ar)(50)/ show very fast initial recombination due to the motion of the lighter Cl atom. The mass asymmetry in ICl- is found to have a strong influence on the detailed kinematics of the system such as the solvent dependence of the energy transfer and the movement of the center of mass of the diatom. To examine the effects on the dynamics by the structural changes in the solvents, we considered variations of the linear-chain model such as the one-sided chain model (Ar)So[Cl-I](-) and the linear cluster model (Ar)(5)[Cl-I](-)(Ar)(5).