Based on graphene, a new class of second-order nonlinear optical(NLO) material, the lithium salt of NH2-substituted graphene nanoribbon with the twofold donor(D)/acceptor(A) mode, was reported. Eight stable 2Li-...Based on graphene, a new class of second-order nonlinear optical(NLO) material, the lithium salt of NH2-substituted graphene nanoribbon with the twofold donor(D)/acceptor(A) mode, was reported. Eight stable 2Li-2NH2-GNR lithium salts, especially cis lithium salts, display considerably large β0 values. The combination of NH2-substituting and cis Li-doping makes β0 greatly increased from 0(GNR) to 1.2×105―2.9×105 a.u.(cis-2Li- 2NH2-GNRs). Our largest β0 value(2.9×105 a.u.) for cis-2Li-1,3-2NH2-AGNR is comparable to the record value of 1.7×105 a.u. for a long donor-acceptor polyene.展开更多
Ⅰ. INTRODUCTIONA triple system S<sub>λ</sub>(2, 3, v)is an ordered pair (V,), where Vis a v-set, is a collection of 3-subsets (called triples ) of V such that each pair of distinct dements of V is ...Ⅰ. INTRODUCTIONA triple system S<sub>λ</sub>(2, 3, v)is an ordered pair (V,), where Vis a v-set, is a collection of 3-subsets (called triples ) of V such that each pair of distinct dements of V is contained in exactly λ triples. An S<sub>2</sub>(2, 3, v)is called a twofold triple system.展开更多
基金Supported by the National Natural Science Foundation of China(Nos.20773046, 20773048 and 21073075)
文摘Based on graphene, a new class of second-order nonlinear optical(NLO) material, the lithium salt of NH2-substituted graphene nanoribbon with the twofold donor(D)/acceptor(A) mode, was reported. Eight stable 2Li-2NH2-GNR lithium salts, especially cis lithium salts, display considerably large β0 values. The combination of NH2-substituting and cis Li-doping makes β0 greatly increased from 0(GNR) to 1.2×105―2.9×105 a.u.(cis-2Li- 2NH2-GNRs). Our largest β0 value(2.9×105 a.u.) for cis-2Li-1,3-2NH2-AGNR is comparable to the record value of 1.7×105 a.u. for a long donor-acceptor polyene.
基金Project supported by the National Natural Science Foundation of China.
文摘Ⅰ. INTRODUCTIONA triple system S<sub>λ</sub>(2, 3, v)is an ordered pair (V,), where Vis a v-set, is a collection of 3-subsets (called triples ) of V such that each pair of distinct dements of V is contained in exactly λ triples. An S<sub>2</sub>(2, 3, v)is called a twofold triple system.