1
|
Mellado M, Sariego-Kluge R, Valdés-Navarro F, González C, Sánchez-González R, Pizarro N, Villena J, Jara-Gutierrez C, Cordova C, Bravo MA, Aguilar LF. Synthesis of fluorescent chalcones, photophysical properties, quantitative structure-activity relationship and their biological application. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2023; 291:122332. [PMID: 36652804 DOI: 10.1016/j.saa.2023.122332] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/16/2022] [Revised: 12/01/2022] [Accepted: 01/03/2023] [Indexed: 06/17/2023]
Abstract
The development of fluorescent pigments is an area of interest in several research fields due to their high sensitivity. In the current study-eight known and three new N,N-dimethylamino-chalcones (12a-k) were synthesized with good yields using the Claisen-Schmidt reaction. For each molecular system, the photophysical properties, including the maximum absorption wavelength (λAbsorption), molar absorption coefficient (ε), maximum excitation wavelength (λExcitation), maximum emission wavelength (λEmission), Stokes Shift (Δλ), fluorescence quantum yield (Φfl), fluorescence lifetime (τfl), radiative and non-radiative rate constants (kR and kNR, respectively) were evaluated. Variations in each of these properties were analyzed depending on the substituents present on each compound. To relate the chemical structures of the synthesized compounds to their photophysical properties, Hansch analysis (2D-QSPR) was applied. As a result of Hansch analysis, we found different photophysical properties related to molecular orbitals and the energy of their derivatives (Highest Occupied Molecular Orbital-HOMO, Lowest Unoccupied Molecular Orbital-LUMO, Difference between LUMO-HOMO-ΔLH, Chemical potential-µ, Hardness-η, Softness-S, and electrophilic global index-ω) as well as to the atomic charges on atoms C5, Cα, Cβ, and CO. The application of this type of analysis has made it possible to understand and subsequently design new molecules with defined photophysical properties. Finally, the compounds were use as fluorescent pigment to get living cell imaging on breast cancer cells, obtaining the compound 12a as promissory alternative.
Collapse
Affiliation(s)
- Marco Mellado
- Instituto de Investigación y Postgrado, Facultad de Ciencias de la Salud, Universidad Central de Chile, Santiago, Chile.
| | - Rafaela Sariego-Kluge
- Instituto de Química, Facultad de Ciencias, Pontificia Universidad Católica de Valparaíso, Valparaíso, Chile
| | - Franco Valdés-Navarro
- Instituto de Química, Facultad de Ciencias, Pontificia Universidad Católica de Valparaíso, Valparaíso, Chile
| | - César González
- Departamento de Química, Universidad Técnica Federico Santa María, Valparaíso, Chile
| | - Rodrigo Sánchez-González
- Instituto de Química, Facultad de Ciencias, Pontificia Universidad Católica de Valparaíso, Valparaíso, Chile
| | - Nancy Pizarro
- Universidad Andrés Bello, Facultad de Ciencias Exactas, Departamento de Ciencias Químicas, Viña del Mar, Chile
| | - Joan Villena
- Laboratorio de Bioensayos, Facultad de Medicina, Centro de Investigaciones Biomédicas (CIB), Universidad de Valparaíso, Viña del Mar, Chile
| | - Carlos Jara-Gutierrez
- Laboratorio de Bioensayos, Escuela de Kinesiología, Facultad de Medicina, Centro de Investigaciones Biomédicas (CIB), Universidad de Valparaíso, Viña del Mar, Chile
| | - Claudio Cordova
- Laboratorio de Estructura y Función Celular, Escuela de Medicina, Facultad de Medicina, Universidad de Valparaíso, Valparaíso, Chile
| | - Manuel A Bravo
- Instituto de Química, Facultad de Ciencias, Pontificia Universidad Católica de Valparaíso, Valparaíso, Chile
| | - Luis F Aguilar
- Instituto de Química, Facultad de Ciencias, Pontificia Universidad Católica de Valparaíso, Valparaíso, Chile.
| |
Collapse
|
2
|
Long J, Chen Y, Cao D, Chen P, Yang M. Yield and Properties Prediction Based on the Multicondition LSTM Model for the Solvent Deasphalting Process. ACS OMEGA 2023; 8:5437-5450. [PMID: 36816643 PMCID: PMC9933188 DOI: 10.1021/acsomega.2c06624] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/14/2022] [Accepted: 01/24/2023] [Indexed: 06/18/2023]
Abstract
Solvent deasphalting (SDA) is a complex multiscale continuous process. The operation mode of the SDA process is not considered in the related data-driven model. Therefore, this paper proposes a time lag process prediction model with multiple operation modes to solve the above problem. First, based on random forests, the relative importance of initial input variables in the SDA process on DAO yield and Conradson carbon residual are studied and features are selected according to the results. Then, the stack denoising autoencoder (SDAE) is used to reconstruct the data and obtain the nonlinear mapping information of hidden layers of SDAE and achieve feature dimension reduction. SDAE can improve clustering accuracy of fuzzy c-means, and the operation mode of SDA process is accurately divided. Long short-term memory (LSTM) is used to establish a multicondition LSTM model. Compared with the traditional LSTM model, the multicondition LSTM model has a higher prediction accuracy with R 2 > 0.95. The sensitivity analyses of the properties of feed and operating conditions on DAO yield are consistent with the principle of two-phase countercurrent extraction in the SDA process. In addition, the benchmark test of the Tennessee Eastman process shows that the proposed method is also effective in the fault detection of other processes. Because the multicondition LSTM can predict the future process measurement data according to operating mode, it can better avoid the false alarm problem and predict the fault earlier.
Collapse
|
3
|
Janes A, Flanagan RC, Payne A, Newlands C. Predicting the Fire and Explosion Properties of Early-Phase Active Pharmaceutical Ingredients. Org Process Res Dev 2021. [DOI: 10.1021/acs.oprd.1c00197] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Antony Janes
- Process Safety, GlaxoSmithKline, Medicines Research Centre, Gunnels Wood Road, Stevenage SG1 2NK, U.K
| | - Roy C. Flanagan
- Clinical Supply Chain, GlaxoSmithKline, 1011 North Arendell Avenue, Zebulon, North Carolina 27597, United States
| | - Andrew Payne
- Process Safety, GlaxoSmithKline, Medicines Research Centre, Gunnels Wood Road, Stevenage SG1 2NK, U.K
| | - Chris Newlands
- Process Safety, GlaxoSmithKline, 980 Great West Road, Brentford, Middlesex TW8 9GS, U.K
| |
Collapse
|