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Title: Computational modeling of curcumin-based fluorescent probe molecules

Journal Article · · Theoretical Chemistry Accounts
 [1];  [1];  [1];  [1];  [2]; ORCiD logo [3];  [4]; ORCiD logo [1]
  1. Univ. of Oklahoma, Norman, OK (United States)
  2. Nazarbayev Univ., Astana (Kazakhstan); Novosibirsk State Univ., Novosibirsk (Russia)
  3. Brookhaven National Lab. (BNL), Upton, NY (United States)
  4. Massachusetts General Hospital and Harvard Medical School, Boston, MA (United States)

In recent years, a series of curcumin analogs have been designed as fluorescent probes for detecting and imaging Aβ peptide aggregates and reactive oxygen species (ROS) in Alzheimer’s disease (AD) brains. In order to gain a better understanding of the photophysical properties of these probe molecules, a systematical computational investigation was performed using the time-dependent density functional theory (TDDFT) calculations. Computed absorption and emission wavelengths well reproduced the spectral shifts among the curcumin analogs. In particular, for a recently proposed pair of probe molecules, CRANAD-5 and CRANAD-61, for sensing ROS in preclinical studies of AD brains, their emission wavelength difference was found to arise from a delocalization of the lowest unoccupied molecular orbital of CRANAD-61 from the curcuminoid backbone to the oxalate moiety. Altogether, this study reaffirms the value of employing TDDFT calculations to assist the design of new curcumin-based fluorescence probes for AD research.

Research Organization:
Brookhaven National Laboratory (BNL), Upton, NY (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
Grant/Contract Number:
SC0012704
OSTI ID:
1496576
Report Number(s):
BNL--211293-2019-JAAM
Journal Information:
Theoretical Chemistry Accounts, Journal Name: Theoretical Chemistry Accounts Journal Issue: 2 Vol. 138; ISSN 1432-881X
Publisher:
SpringerCopyright Statement
Country of Publication:
United States
Language:
English

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