No, you're not entitled to the dividend payment, as you bought the shares after the "Ex-Dividend" Date. The price you paid for the stocks should have been reduced accordingly to reflect that.
Declaration date: When the company says how much the dividend will be. Absent some catastrophic event after that, this is a promise that they will pay this much as a dividend on the nominated day.
The share price will tend to react to the announced dividend by going up if it was above predictions and going down if it was below predictions. This reaction is all about the market's perception of the company's value and the value of having a guaranteed cashflow, rather than some intrinsic change in the value of the shares.
Ex-Dividend date: When the ownership of the shares is snapshotted to determine who actually receives the dividend. Anyone owning shares up to and including the market opening time on the ex-dividend date is entitled to the dividend.
The share price will naturally drop by the amount of the dividend when the market opens on the ex-dividend date, to reflect the fact that new purchasers will not receive the dividend. As well as this intrinsic change in value, other overnight events may affect the share price in the normal way that share prices move.
Payment date: When the dividend is actually paid out to the people who are entitled to it.