水溶液中H+离子的浓度。强酸溶液中H+主要来自酸分子电离，强碱溶液中H+主要来自水分子。
我想要查化合物的pKa值，譬如普罗帕酮，在Scifinder 上查到pka acidic=13.82, pKa bisic=9.31,...
Acidic Introduction to pH - the acidic and basic (alkaline) definition. pH can be viewed as an abbreviation for power of Hydrogen - or more completely, power of the concentration of the Hydrogen ionin a liquid. The mathematical definition of pH is a bit less intuitive but in general ...
The application of merocyanine photoacids has previously been largely limited to neutral and acidic pH values. Here we introduce a new merocyanine photoacid with superior pH switching qualities. By increasing the pKa in the dark (pKdarka) and the solubility we increased the reversible visible ...
遇到同样的问题，不知道你是否已经解决，麻烦相告
pKa26.83 (0.03)6.67 (0.03)6.57 (0.03) pKa39.75 (0.04)9.75 (0.05)9.73 (0.04) pKa410.49 (0.05)10.55 (0.05)10.47 (0.05) pKa511.53 (0.06)11.48 (0.07)11.50 (0.07) pKw14.57 (0.07)14.19 (0.07)14.08 (0.06) σEMFa0.390.360.32 σvb0.0050.0050.005 ...
(Fig.2).2,6,8More than 60 acid hydrolases, including proteases, lipases, nucleases, have been found within the lysosome, and they require an acidic (pH ~4.5) environment maintained by the cooperation of an ATP-driven proton pump called the vacuolar H + -adenosine triphosphatase (v-...
Re: Will a solution of ammonium acetate be acidic, basic, or neutral? «Reply #1 on:February 26, 2013, 03:21:13 AM » You can look up the pKa of acetic acid and the pKb of ammonia and calculate the pH. Logged My research:Google ScholarandResearchgate ...
FUNCTIONAL GROUP AMINO ACID Acidic Basic Neutral Aliphatic Aromatic Whatever Hydrophilic, Polar Carboxylates —COOϪ Amines —NHϩ3 Amides —CONH2 Alcohols —OH Thiol —SH Hydrophobic, Apolar —CH2— C Rings Asp, Glu Lys, Arg, His Asn, Gln Ser, Thr, Tyr Cys Ala, Val, Leu, Ile, Met...
Both CNDO/2 and MNDO protonation energies correlate well with the experimental pKa values determined in four different solvents: acetonitrile, propylene carbonate, nitromethane, and water, the slopes being however much less than unity which indicates the important role of the solvation effect. Based ...