Nonconjugated Alkyl Chains in Ionic Molecular Rotor Fluorophores: An Effective Modulating Moiety for Amyloid-β Probes.
Z, Z., J, Y., Z, L., Z, W., YL, W., X, D., & T, Q. (n.d.). Nonconjugated Alkyl Chains in Ionic Molecular Rotor Fluorophores: An Effective Modulating Moiety for Amyloid-β Probes.. Analytical chemistry. https://doi.org/10.1021/acs.analchem.6c00656
Z Z, J Y, Z L, Z W, YL W, X D, et al. Nonconjugated Alkyl Chains in Ionic Molecular Rotor Fluorophores: An Effective Modulating Moiety for Amyloid-β Probes.. Analytical chemistry. doi: 10.1021/acs.analchem.6c00656
Z Z, J Y, Z L, et al. Nonconjugated Alkyl Chains in Ionic Molecular Rotor Fluorophores: An Effective Modulating Moiety for Amyloid-β Probes.[J]. Analytical chemistry. DOI: 10.1021/acs.analchem.6c00656.
@article{z,
author = {Zhang Z and Yi J and Lin Z and Wang Z and Wang YL and Du X and Qin T},
title = {Nonconjugated Alkyl Chains in Ionic Molecular Rotor Fluorophores: An Effective Modulating Moiety for Amyloid-β Probes.},
journal = {Analytical chemistry},
doi = {10.1021/acs.analchem.6c00656},
note = {PMID: 42549965},
}
TY - JOUR AU - Zhang Z AU - Yi J AU - Lin Z AU - Wang Z AU - Wang YL AU - Du X AU - Qin T TI - Nonconjugated Alkyl Chains in Ionic Molecular Rotor Fluorophores: An Effective Modulating Moiety for Amyloid-β Probes. T2 - Analytical chemistry DO - 10.1021/acs.analchem.6c00656 AN - PMID:42549965 ER -
Developing molecular structural tuning strategies for ionic molecular rotor (MR)-based β-amyloid (Aβ) fluorescent probes is essential for balancing high sensitivity, signal-to-background ratio (SBR) in wash-free mode, and blood-brain barrier (BBB) permeability. Compared with the widely used adjustment strategy on the electron donor, π-bridge, and electron acceptor, the nonconjugated hydrophobic part that can directly affect the lipophilicity and dispersion of the whole ionic MRs has been omitted. Herein, we developed a series of diarylbutadiene ionic MRs with variable alkyl chains substituted on the nitrogen atom of pyridinium (DM-Cn), and unveiled the relationship between the length of alkyl (ethyl to undecyl) and the spectral response, binding process, and imaging performance. The N-alkyl extension enhanced the sensitivity, strengthened the binding affinity, and facilitated BBB permeability; however, it hindered achieving a high SBR in the wash-free mode. We successfully deployed three representatives (DM-C2, DM-C7, DM-C11) for both in vitro and in vivo imaging of the Aβ plaques in AD mice, among which DM-C7 with a finite extended N-alkyl chain displayed the most satisfactory and balanced sensing performance. The findings of this study establish a decisive structure-performance relationship for ionic MR-based Aβ probes, which can facilitate the on-demand design of new probes and imaging applications.