Photokinetics of oil soluble 1,3,5-Triazine UV filters in combination with Butyl Methoxydibenzoylmethane or with Diethylamino Hydroxybenzoyl Hexyl Benzoate

Sohn, Myriam; Baptiste, Laure; Quass, Katja; Settels, Volker; Herzog, Bernd

doi:10.1016/j.jpap.2021.100073

Cited by 4 publications

(3 citation statements)

References 17 publications

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“…In contrast, only a modest photodegradation of EHT was observed in the PCNF MOM microshells (Figure a,b). In terms of photodegradation kinetics, − the photodegradation of a UV absorber A is described as follows: A false → h ν A ′ , where h is the Plank constant, ν is the frequency of the radiation, and A ′ is the reaction product. From this simple photoreaction, the rate can be described as − normald C A normald t = φ A I a = φ A I 0 false( 1 − e − ε C A L false) , where C A is the concentration of the photodegradable compound A at time t , φ A is the quantum yield for excitation of A , I 0 is the light intensity, I a is the absorbed intensity, ε is the molar extinction coefficient, and L is the optical path length.…”

Section: Resultsmentioning

confidence: 99%

Substantial Confinement of Crystal Growth of Organic Crystalline Materials in Metal–Organic Membrane Microshells

Jeon,

Seo,

Yang

et al. 2024

Langmuir

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This study proposes a robust microshell encapsulation system in which a metal−organic membrane (MOM), consisting of phytic acids (PAs) and metal ions, intrinsically prevents the molecular crystal growth of organic crystalline materials (OCMs). To develop this system, OCM-containing oil-in-water (O/W) Pickering emulsions were enveloped with the MOM, in which anionic pulp cellulose nanofiber (PCNF) primers electrostatically captured zinc ions at the O/W interface and chelated with PA, thus producing the MOM with a controlled shell thickness at the micron scale. We ascertained that the MOM formation fills and covers ∼75% of the surface pore size of PCNF films, which enhances the interfacial modulus by 2 orders of magnitude compared to that when treated with bare PCNFs. Through a feasibility test using a series of common OCMs, including ethylhexyl triazone, avobenzone, and ceramide, we demonstrated the excellent ability of our MOM microshell system to stably encapsulate OCMs while retaining their original molecular structures over time. These findings indicate that our MOM-reinforced microshell technology can be applied as a platform to substantially confine the crystal growth of various types of OCMs.

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Section: Resultsmentioning

confidence: 99%

Substantial Confinement of Crystal Growth of Organic Crystalline Materials in Metal–Organic Membrane Microshells

Jeon,

Seo,

Yang

et al. 2024

Langmuir

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“…Compared with Avobenzone and other traditional high-performance UVA sunscreens, DHHB molecules contain only one C=O double bond between two benzene rings, and there is no photodegradation caused by isomerization reaction, which greatly improvs their photostability [4][5] .…”

Section: Introductionmentioning

confidence: 99%

Influence Of hydrogen bonding on the Photo-physical properties of Diethylamino hydroxybenzoyl hexyl benzoate

Zhang

et al. 2023

Preprint

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In this paper, the effects of different hydrogen bond types on the photophysical properties of DHHB were investigated by systematically investigating the changes of spectral properties of Diethylamino hydroxybenzoyl hexyl benzoate in protonic and aprotic solvents, and the formation and stability of hydrogen bonds were further studied. Studies have shown that different solvent types and solute concentrations would affected the type of hydrogen bonds, and temperature changes would affected the stability of hydrogen bonds. In aprotic solvents, DHHB could only formed intramolecular hydrogen bonds and DHHB-DHHB intermolecular hydrogen bonds. At low concentration (≤ 5µg/mL), the system mainly existed in the form of intramolecular hydrogen bonds. At this time, the fluorescence intensity and UV molar extinction coefficient changed little, indicating that intramolecular hydrogen bonds have little effected on the spectral properties of DHHB. With the increase of concentration, the number of intermolecular hydrogen bonds increased, UV molar extinction coefficient increased significantly, indicating that intermolecular hydrogen bonds were conducive to improving the UV absorption properties of DHHB. With the increase of temperature, the molar extinction coefficient of the system decreased, indicating that the increase of temperature would led to the decrease of the stability of hydrogen bond fracture between DHHB molecules and reduced the UV absorption performance of DHHB. In the protic solvent, the system also has DHHB-solvent intermolecular hydrogen bonds. With the increase of the proportion of protonic solvent in the system, the fluorescence intensity of the system decreased significantly and the UV integral area increased significantly, indicating that the hydrogen bond between DHHB-solvent molecules was beneficial to improve the UV absorption performance of DHHB.

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“…Compared with avobenzone and other traditional high-performance UVA sunscreens, DHHB molecules contain only one C=O double bond between two benzene rings. There is no photodegradation caused by an isomerization reaction, which greatly improves photostability [4,5]. Good UV absorption, excellent light stability, and safety and environmental friendliness in water render DHHB irreplaceable in the field of sunscreen.…”

Section: Introductionmentioning

confidence: 99%

Influence of Hydrogen Bonding on the Photophysical Properties of Diethylamino Hydroxybenzoyl Hexyl Benzoate

Zhang

et al. 2023

Processes

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In this study, we investigated the effects of different hydrogen bond types on the photophysical properties of diethylamino hydroxybenzoyl hexyl benzoate (DHHB) by systematically exploring the changes in the spectral properties of DHHB in protic and aprotic solvents. The formation and stability of hydrogen bonds were also studied, demonstrating that the system mainly existed in the form of intramolecular hydrogen bonds at low concentrations (≤5 μg/mL). In these circumstances, the fluorescent intensity, and molar absorption coefficient changed little, indicating that the intramolecular hydrogen bonds had little effect on the spectral properties of DHHB. With an increase in concentration, the number of intermolecular hydrogen bonds increased and the molar absorption coefficient significantly increased, indicating that the intermolecular hydrogen bonds were conducive to improving the UV absorption properties of DHHB. With an increase in temperature, the molar absorption coefficient of the system decreased, which reduced the UV absorption performance of DHHB. In the protic solvent, the system also contained DHHB–solvent intermolecular hydrogen bonds. With an increase in the proportion of protic solvent in the system, the fluorescent intensity of the system significantly decreased, and the UV integral area significantly increased, indicating that the hydrogen bond between DHHB and the solvent molecules was beneficial in terms of improving the UV absorption performance of DHHB.

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Photokinetics of oil soluble 1,3,5-Triazine UV filters in combination with Butyl Methoxydibenzoylmethane or with Diethylamino Hydroxybenzoyl Hexyl Benzoate

Cited by 4 publications

References 17 publications

Substantial Confinement of Crystal Growth of Organic Crystalline Materials in Metal–Organic Membrane Microshells

Substantial Confinement of Crystal Growth of Organic Crystalline Materials in Metal–Organic Membrane Microshells

Influence Of hydrogen bonding on the Photo-physical properties of Diethylamino hydroxybenzoyl hexyl benzoate

Influence of Hydrogen Bonding on the Photophysical Properties of Diethylamino Hydroxybenzoyl Hexyl Benzoate

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