[{"from": "human", "value": "Given SMILES, write its band gap at normal measurement conditions.. ->  CC1=CC([Si]2(C[C@H](CC)CCCC)C[C@H](CC)CCCC)=C(S1)C3=C2C=C(S3)C4=CC(C[C@@H](CCCC)CC)=C(C5=NC(SC(C6=C(CC(CCCC)CC)C=C(C)S6)=N7)=C7S5)S4\n"}, {"from": "gpt", "value": " 1.82\n"}]