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제  목 :  Tailor-made Synthesis of Multilayered Trimetallocyclophanes via Transannula p-p Interactions

연  사 :  정옥상 교수님(부산대학교 화학과)

일  시 :  2018년 4월 5일(목) 오후 4시 15분   
장  소 :  화학관 1층 첨단강의실(330118호)

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Tailor-made Synthesis of Multilayered Trimetallocyclophanes via

                                Transannula p-pInteractions

 

                                                              Ok-Sang Jung*

      Department of Chemistry, Pusan National University, Pusan 609-735, Korea

Abstract

Synthesis and operation of a nano-demension 24 × 24 × 15 ų “left and right ball-joint-type

 host-guest system” via one π∙∙∙π interaction and three NH∙∙∙O=C hydrogen-bonds along with

the combined helicity are described. The system consists of unprecedented conglomerate

aggregates of two distinct helical metallacyclophanes, chiral isomer (P)-[Pd₃X₆(L₁)₂]@(M)-

[Pd₃X₆(L₁)(L₂)] and its enantiomer (M)-[Pd₃X₆(L₁)₂]@(P)- [Pd₃X₆(L₁)(L₂)]are described.

Successive reactions afford desirable four-layered metallacyclophanes via tailor-made

procedure. Synthesis and operation of a nano-demension size multilayered metallacyclophane

system via one π∙∙∙π interaction along with the combined helicity are described. A synthetic

strategy of generation of new molecular species utilizing a provision of nature has been

reported: nano-dimensional (23(2) × 21(1) × 16(1) ų) hetero four-layered trimetalla-

cyclophanes via the proof-of-concept experiments that utilize a suitable combination of π∙∙∙π

interactions between the central aromatic rings, tailor-made short/long spacer tridentate donors,

and the combined helicity are constructed. The unprecedented four-layered metallacyclophane

system’s behavior offers a landmark in the development of new molecular system.