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• A new Zn based polyrotaxane 3D metal-organic framework (MOF), {[Zn 3 (BTC) 2 (Bimb) 3.5 ][Zn(HCOO)(Bimb) 1.5 ]·CH 3 COO·2(CH 3) 2 NH·2DMF·9H 2 O} n (KA@MOF-S2) has been synthesized under solvothermal conditions. • KA@MOF-S2 possesses a new 3,3,3-c net 3-nodal interpenetrated network with (122.14)(8.122)(83) 2 topology. • Detection of various concentration of sucrose, 80 mg/dl and 100 mg/dl showed highest 85.6 % and 84.7 % quenching efficiency of KA@MOF-S2. • KA@MOF-S2 can be used as a highly sensitive fluorescence sensing material for the quantitative detection of Acetone, NB, NFT, UA and sucrose. • KA@MOF-S2 showed photocatalytic degradation of Rose Bengal (RB) and Congo Red (CR) dye under sun-light irradiation. A new Zn based polyrotaxane 3D metal-organic framework (MOF), {[Zn 3 (BTC) 2 (Bimb) 3.5 ][Zn(HCOO)(Bimb) 1.5 ]·CH 3 COO·2(CH 3) 2 NH·2DMF·9H 2 O} n (KA@MOF-S2)(Bimb = 1,4-bis[(1H-imidazol-1-yl)methyl]benzene, BTC3‒ = 1,3,5-benzenzetricarboxylate) has been synthesized under solvothermal conditions. Single-crystal X-ray diffraction analysis reveals that KA@MOF-S2 exhibits a novel 1D + 3D → 3D interpenetratedPolyrotaxane MOF architecture. KA@MOF-S2 possesses a new 3,3,3-c net 3-nodal interpenetrated network with (122.14)(8.122)(83) 2 topology. KA@MOF-S2 can be used as a selective fluorescence sensing material for the quantitative detection of VOCs (Acetone, NB), antibiotic (NFT) and biomolecules (UA, sucrose) and photocatalytic degradation of Rose Bengal (RB) and Congo Red (CR) dye under sun-light irradiation. Synthesised a new KA@MOF-S2 is highly fluorescence sensing material for the quantitative detection of Acetone, NB, NFT, UA and sucrose as well as degradation of RB and CR dye under irradiation. [Display omitted] [ABSTRACT FROM AUTHOR]