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Second-harmonic generation from monolayer Langmuir–Blodgett films of various push–pull pyridine and terpyridine metal complexes |
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| Authors: | Danika Locatelli Silvio Quici Stefania Righetto Dominique Roberto Francesca Tessore Geoffrey J. Ashwell Mukhtar Amiri |
| Affiliation: | aDipartimento di Chimica Inorganica, Metallorganica e Analitica dell' Università di Milano, via Venezian 21, 20133 Milano, Italy bUdR dell'INSTM di Milano, via Venezian 21, 20133 Milano, Italy cCentro di Eccellenza CIMAINA, via Venezian 21, 20133 Milano, Italy dIstituto di Scienze e Tecnologie Molecolari del CNR (ISTM), via Golgi 19, 20133 Milano, Italy eThe Nanomaterials Group, Cranfield University, Cranfield MK43 0AL, UK |
| Abstract: | The new ligands (E)-4-[2-(4-(N-methyl-N-hexadecylaminophenyl)ethenyl]pyridine (L1) and 4′-(C6H4-p-N(Me)(hexadecyl))-2,2′:6′,2″-terpyridine (L2) were prepared along with their complexes [cis-Ir(CO)2ClL1], [fac-Os(CO)3Cl2L1], [ZnCl2L2] and [IrCl3L2]. Whereas these complexes show a large second-order nonlinear optical (NLO) response at the molecular level, similar to that of related organic alkylated salts as evidenced by the Electric Field Induced Second-Harmonic (EFISH) generation technique, their Langmuir–Blodgett (LB) film susceptibility is lower than that of the salts. |
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