35 research outputs found
Π£ΡΠΎΠ²Π΅ΡΡΠ΅Π½ΡΡΠ²ΠΎΠ²Π°Π½Π½ΡΠΉ ΠΌΠ΅ΡΠΎΠ΄ ΠΏΠΎΠ»ΡΡΠ΅Π½ΠΈΡ Π³Π΅ΠΏΡΠΈΠ»ΠΎΠ²ΠΎΠ³ΠΎ ΡΡΠΈΡΠ° 4-ΡΡΠΈΡΡΠΎΡΠ°ΡΠ΅ΡΠΈΠ»Π±Π΅Π½Π·ΠΎΠΉΠ½ΠΎΠΉ ΠΊΠΈΡΠ»ΠΎΡΡ
A convenient three-step method for synthesis of heptyl (4-triο¬uoroacetyl)benzoate, an important neutral anionΒ carrier, has been developed. The key step of the method is acylation of toluene by triο¬uoroacetic anhydride in presence of aluminium chloride at β8 β β10 oC. The procedure gives high overall yield and, unlike the earlier methods, does not include any organometallic reagents, therefore allowing scaling it up to several hundred grams, that makes the target compound much more readily available.Π£ΡΠΎΠ²Π΅ΡΡΠ΅Π½ΡΡΠ²ΠΎΠ²Π°Π½Π½ΡΠΉ ΠΌΠ΅ΡΠΎΠ΄ ΠΏΠΎΠ»ΡΡΠ΅Π½ΠΈΡ Π³Π΅ΠΏΡΠΈΠ»ΠΎΠ²ΠΎΠ³ΠΎ ΡΡΠΈΡΠ° 4-ΡΡΠΈΡΡΠΎΡΠ°ΡΠ΅ΡΠΈΠ»Π±Π΅Π½Π·ΠΎΠΉΠ½ΠΎΠΉ ΠΊΠΈΡΠ»ΠΎΡΡ Π Π°Π·ΡΠ°Π±ΠΎΡΠ°Π½ ΡΠ΄ΠΎΠ±Π½ΡΠΉ ΡΡeΡ
ΡΡΠ°Π΄ΠΈΠΉΠ½ΡΠΉ ΠΌΠ΅ΡΠΎΠ΄ ΡΠΈΠ½ΡΠ΅Π·Π° Π³Π΅ΠΏΡΠΈΠ»ΠΎΠ²ΠΎΠ³ΠΎ ΡΡΠΈΡΠ° 4-ΡΡΠΈΡΡΠΎΡΠ°ΡΠ΅ΡΠΈΠ»Π±Π΅Π½Π·ΠΎΠΉΠ½ΠΎΠΉ ΠΊΠΈΡΠ»ΠΎΡΡ, ΡΠΈΡΠΎΠΊΠΎ ΠΏΡΠΈΠΌΠ΅Π½ΡΡΡΠ΅Π³ΠΎΡΡ Π² ΠΏΠΎΡΠ΅Π½ΡΠΈΠΎΠΌΠ΅ΡΡΠΈΡΠ΅ΡΠΊΠΎΠΌ Π°Π½Π°Π»ΠΈΠ·Π΅ Π² ΠΊΠ°ΡΠ΅ΡΡΠ²Π΅ Π½Π΅ΠΉΡΡΠ°Π»ΡΠ½ΠΎΠ³ΠΎ ΠΏΠ΅ΡΠ΅Π½ΠΎΡΡΠΈΠΊΠ° Π°Π½ΠΈΠΎΠ½ΠΎΠ². ΠΠ»ΡΡΠ΅Π²ΠΎΠΉ ΡΡΠ°Π΄ΠΈΠ΅ΠΉ ΠΌΠ΅ΡΠΎΠ΄Π° ΡΠ²Π»ΡΠ΅ΡΡΡ Π°ΡΠΈΠ»ΠΈΡΠΎΠ²Π°Π½ΠΈΠ΅ ΡΠΎΠ»ΡΠΎΠ»Π° ΡΡΠΈΡΡΠΎΡΡΠΊΡΡΡΠ½ΡΠΌ Π°Π½Π³ΠΈΠ΄ΡΠΈΠ΄ΠΎΠΌ Π² ΠΏΡΠΈΡΡΡΡΡΠ²ΠΈΠΈ Ρ
Π»ΠΎΡΠΈΠ΄Π° Π°Π»ΡΠΌΠΈΠ½ΠΈΡ ΠΏΡΠΈ β8 β β10 oC. ΠΠ°Π½Π½Π°Ρ ΠΏΡΠΎΡΠ΅Π΄ΡΡΠ° ΠΏΠΎΠ·Π²ΠΎΠ»ΡΠ΅Ρ ΠΏΠΎΠ»ΡΡΠΈΡΡ Π²ΡΡΠΎΠΊΠΈΠΉ ΠΎΠ±ΡΠΈΠΉ Π²ΡΡ
ΠΎΠ΄ ΠΏΡΠΎΠ΄ΡΠΊΡΠ° ΠΈ, Π² ΠΎΡΠ»ΠΈΡΠΈΠ΅ ΠΎΡ ΠΎΠΏΠΈΡΠ°Π½Π½ΡΡ
Π² Π»ΠΈΡΠ΅ΡΠ°ΡΡΡΠ΅ ΠΌΠ΅ΡΠΎΠ΄ΠΈΠΊ, Π½Π΅ ΡΡΠ΅Π±ΡΠ΅Ρ ΠΈΡΠΏΠΎΠ»ΡΠ·ΠΎΠ²Π°Π½ΠΈΡ ΠΌΠ΅ΡΠ°Π»Π»ΠΎΠΎΡΠ³Π°Π½ΠΈΡΠ΅ΡΠΊΠΈΡ
ΡΠ΅Π°Π³Π΅Π½ΡΠΎΠ², ΡΡΠΎ ΠΏΠΎΠ·Π²ΠΎΠ»ΡΠ΅Ρ ΡΠ²Π΅Π»ΠΈΡΠΈΡΡ ΠΌΠ°ΡΡΡΠ°Π± ΡΠΈΠ½ΡΠ΅Π·Π° Π΄ΠΎ ΡΠΎΡΠ΅Π½ Π³ΡΠ°ΠΌΠΌΠΎΠ² ΠΈ ΡΠ΄Π΅Π»Π°ΡΡ ΡΠ΅Π»Π΅Π²ΠΎΠΉ ΠΏΡΠΎΠ΄ΡΠΊΡ Π·Π½Π°ΡΠΈΡΠ΅Π»ΡΠ½ΠΎ Π±ΠΎΠ»Π΅Π΅ Π΄ΠΎΡΡΡΠΏΠ½ΡΠΌ
ΠΠ»ΠΈΡΠ½ΠΈΠ΅ Π·Π°ΡΠ΅Π»Π΅Π½ΠΈΡ ΡΡΠΈΠΏΠ»Π΅ΡΠ½ΠΎΠ³ΠΎ ΡΠΎΡΡΠΎΡΠ½ΠΈΡ Π’1 Π½Π° ΠΊΠΈΠ½Π΅ΡΠΈΠΊΡ ΠΏΠΎΠ»ΡΡΠΈΠ·Π°ΡΠΈΠΈ ΡΠ»ΡΠΎΡΠ΅ΡΡΠ΅Π½ΡΠΈΠΈ ΠΎΡΠ³Π°Π½ΠΈΡΠ΅ΡΠΊΠΈΡ ΡΠ»ΡΠΎΡΠΎΡΠΎΡΠΎΠ²
ΠΠΈΠ½Π΅ΡΠΈΠΊΠ° ΠΏΠΎΠ»ΡΡΠΈΠ·Π°ΡΠΈΠΈ ΡΠ»ΡΠΎΡΠ΅ΡΡΠ΅Π½ΡΠΈΠΈ ΠΎΡΠ³Π°Π½ΠΈΡΠ΅ΡΠΊΠΈΡ
ΡΠ»ΡΠΎΡΠ΅ΡΡΠΈΡΡΡΡΠΈΡ
ΠΌΠΎΠ»Π΅ΠΊΡΠ», Π° ΡΠ°ΠΊΠΆΠ΅ ΠΌΠΎΠ»Π΅ΠΊΡΠ», ΠΈΠΌΠ΅ΡΡΠΈΡ
ΠΏΠ΅ΡΠ΅Ρ
ΠΎΠ΄ΡΡΠΈΠ΅ Π΄ΡΡΠ³ Π² Π΄ΡΡΠ³Π° ΠΏΠΎΠ΄ Π΄Π΅ΠΉΡΡΠ²ΠΈΠ΅ΠΌ ΡΠ²Π΅ΡΠ° Π΄Π²Π΅ ΠΈΠ·ΠΎΠΌΠ΅ΡΠ½ΡΠ΅ ΡΠΎΡΠΌΡ, ΠΌΠΎΠ»Π΅ΠΊΡΠ»ΡΡΠ½ΡΠ΅ ΠΎΡΡΠΎΠ²Ρ ΠΊΠΎΡΠΎΡΡΡ
Π½Π΅ΠΏΠΎΠ΄Π²ΠΈΠΆΠ½Ρ, ΠΈΡΡΠ»Π΅Π΄ΠΎΠ²Π°Π½Π° ΡΠΈΡΠ»Π΅Π½Π½ΡΠΌΠΈ ΠΌΠ΅ΡΠΎΠ΄Π°ΠΌΠΈ, ΠΎΡΠ½ΠΎΠ²Π°Π½Π½ΡΠΌΠΈ Π½Π° ΡΠ΅ΡΠ΅Π½ΠΈΠΈ ΡΠΈΡΡΠ΅ΠΌ Π±Π°Π»Π°Π½ΡΠ½ΡΡ
ΡΡΠ°Π²Π½Π΅Π½ΠΈΠΉ Π΄Π»Ρ Π½Π°ΡΠ΅Π»Π΅Π½Π½ΠΎΡΡΠ΅ΠΉ ΡΠ½Π΅ΡΠ³Π΅ΡΠΈΡΠ΅ΡΠΊΠΈΡ
ΡΡΠΎΠ²Π½Π΅ΠΉ. ΠΠ»Ρ ΠΌΠΎΠ΄Π΅Π»ΡΠ½ΡΡ
ΠΎΠ±ΡΠ΅ΠΊΡΠΎΠ² ΠΈΠ·ΡΡΠ΅Π½ΠΎ Π΄Π΅ΠΏΠΎΠ»ΡΡΠΈΠ·ΡΡΡΠ΅Π΅ Π²Π»ΠΈΡΠ½ΠΈΠ΅ Π½ΠΈΠΆΠ½Π΅Π³ΠΎ ΡΡΠΈΠΏΠ»Π΅ΡΠ½ΠΎΠ³ΠΎ ΡΠΎΡΡΠΎΡΠ½ΠΈΡ T1 ΠΈ ΠΏΡΠ΅Π΄ΡΡΠ°Π²Π»Π΅Π½Ρ Π²ΡΠ΅ΠΌΠ΅Π½Π½ΡΠ΅ Π·Π°Π²ΠΈΡΠΈΠΌΠΎΡΡΠΈ ΠΏΠΎΠ»ΡΡΠΈΠ·Π°ΡΠΈΠΈ ΠΏΡΠΈ ΠΊΠ²Π°Π·ΠΈΠΏΠΎΡΡΠΎΡΠ½Π½ΠΎΠΌ ΠΈ ΠΈΠΌΠΏΡΠ»ΡΡΠ½ΠΎΠΌ ΡΠΎΡΠΎΠ²ΠΎΠ·Π±ΡΠΆΠ΄Π΅Π½ΠΈΠΈ. The fluorescence polarization kinetics of organic fluorescent molecules and molecules having two photoisomeric forms with the fixed molecular skeletons was investigated by numerical methods based on the solution of population balance equation systems. For model compounds the depolarizing effect of the lowest triplet state T1 was studied and the time dependence of the polarization at quasi-continuous-wave and pulsed photoexcitation was presented
Growing Cu2S Thin Films by Exposing a Copper Substrate to Gas-Phase Products of Brown Coal Hydrothermal Desulfurization
Thin films of copper(I) sulfide (Cu2S) are synthesized on a copper substrate by exposing it to vapor-phase sulfur-containing products resulting from the hydrothermal desulfurization of brown coal. The synthesized 0.1-mm-thick films have grain sizes in the range of 10β20 ΞΌm, electrical resistivity Ο = 0.92 Ξ© cm at T = 300 K, and bang gap Eg = 1.91 eV. The roughness of the films, in terms of the arithmetic mean deviation of the assessed profile, is Ra = 2.46 ΞΌm. Β© 2018, Pleiades Publishing, Ltd
Growing Cu2S Thin Films by Exposing a Copper Substrate to Gas-Phase Products of Brown Coal Hydrothermal Desulfurization
Thin films of copper(I) sulfide (Cu2S) are synthesized on a copper substrate by exposing it to vapor-phase sulfur-containing products resulting from the hydrothermal desulfurization of brown coal. The synthesized 0.1-mm-thick films have grain sizes in the range of 10β20 ΞΌm, electrical resistivity Ο = 0.92 Ξ© cm at T = 300 K, and bang gap Eg = 1.91 eV. The roughness of the films, in terms of the arithmetic mean deviation of the assessed profile, is Ra = 2.46 ΞΌm. Β© 2018, Pleiades Publishing, Ltd