Work

Chemically Driven Contraction and Elongation: Interconversion between Molecular Figure of Eight

Year: 2025

Type: article

Abstract: A 90‐membered macrocycle having two functional moiety, diphenyl‐phenanthroline (dpp) and two tri‐dentate pyridine‐diamide (pda) as templating center has been synthesized from precursor molecules via amide bond formation in 10 steps. dpp and pda are arranged alternatively around the macrocycle in a sequence of dpp‐pda‐dpp‐pda and demeostrated orthogonal behaviour, when treated with transition metal such as Cu(I) and Co(III): It forms figure of eight complexes selectively between dpp units and pda units respectively due to the geomtric preferance. This makes the macrocycle operates in bimodal manner. Interconversion between figure of eight complexes has been witnessed by metal‐exchange via demetalation and subsequent re‐metalation between orthogonal templating centres. Removal of Cu(I) template is performed using a common and less toxic reagent NH 2 CH 2 CH 2 NH 2 and Co(III) by Zn/CH 3 COOH at RT.

Source: ChemistryOpen

DOI: 10.1002/open.202500081

Authors: Sanjaya Kumar Moharana, Radhakrishna Ratha, Chandra Shekhar Purohit

Institutions: National Institute of Science Education and Research, Homi Bhabha National Institute

Language: English

Topic: Supramolecular Chemistry and Complexes

Subfield: Organic Chemistry

Field: Chemistry

Domain: Physical Sciences

Open Access status: gold

Estimated APC paid: $2,790

Funder: Homi Bhabha National Institute